Parse and ignore private members

Author: sbrunk

samples/modifiers.ts

@@ -37,6 +37,8 @@ declare module modifiers {
       readonly scheme: string;
       readonly authority: string;
       readonly path: string;
+      private cache;
+      private updateCache();
   }
 
 }

src/main/scala/org/scalajs/tools/tsimporter/Importer.scala

@@ -188,6 +188,8 @@ class Importer(val output: java.io.PrintWriter) {
         setterSym.resultType = TypeRef.Unit
         setterSym.isBracketAccess = true
 
+      case PrivateMember => // ignore
+
       case _ =>
         owner.members += new CommentSymbol("??? "+member)
     }

src/main/scala/org/scalajs/tools/tsimporter/Trees.scala

@@ -174,4 +174,6 @@ object Trees {
 
   case class FunctionMember(name: PropertyName, optional: Boolean,
       signature: FunSignature, modifiers: Modifiers) extends MemberTree
+
+  case object PrivateMember extends MemberTree
 }

src/main/scala/org/scalajs/tools/tsimporter/parser/TSDefParser.scala

@@ -276,13 +276,14 @@ class TSDefParser extends StdTokenParsers with ImplicitConversions {
   lazy val indexMember: Parser[MemberTree] =
     ("[" ~> identifier ~ typeAnnotation <~ "]") ~ typeAnnotation ^^ IndexMember
 
-  lazy val namedMember: Parser[MemberTree] =
+  lazy val namedMember: Parser[MemberTree] = {
     modifiers ~ propertyName ~ optionalMarker >> {
       case mods ~ name ~ optional => (
           functionSignature ^^ (FunctionMember(name, optional, _, mods))
         | typeAnnotation ^^ (PropertyMember(name, optional, _, mods))
       )
-    }
+    } | "private" ~> propertyName ~ (functionSignature | ";") ^^^ PrivateMember
+  }
 
   lazy val modifiers: Parser[Modifiers] =
     rep(modifier).map(_.toSet)