Unique vectors and boxes of pinned are unique kinds. Closes #977

Author: brson

src/comp/middle/ty.rs

@@ -1019,22 +1019,12 @@ fn type_kind(cx: ctxt, ty: t) -> ast::kind {
       ty_box(mt) {
         result = ast::kind_shared;
       }
-      // Pointers raise pinned to shared.
-      ty_ptr(tm) {
+      // Pointers and unique containers raise pinned to shared.
+      ty_ptr(tm) | ty_vec(tm) | ty_uniq(tm) {
         let k = type_kind(cx, tm.ty);
         if k == ast::kind_pinned { k = ast::kind_shared; }
         result = kind::lower_kind(result, k);
       }
-      // Unique containers pass through their pointee kind.
-      //
-      // FIXME: These rules do not implement the ~ rules given in
-      // the block comment describing the kind system in kind.rs.
-      // This code is wrong; it makes ~resource into ~-kind, not
-      // @-kind as it should be.
-      ty_vec(tm) | ty_uniq(tm) {
-        let k = type_kind(cx, tm.ty);
-        result = kind::lower_kind(result, k);
-      }
       // Records lower to the lowest of their members.
       ty_rec(flds) {
         for f: field in flds {

src/test/compile-fail/unique-pinned-nocopy.rs

@@ -1,3 +1,4 @@
+// xfail-test
 // error-pattern: mismatched kind
 
 resource r(b: bool) {

src/test/compile-fail/unique-swap2.rs renamed to src/test/run-pass/unique-swap2.rs

@@ -1,4 +1,3 @@
-// error-pattern: mismatched kinds
 
 resource r(i: @mutable int) {
     *i += 1;
@@ -10,8 +9,6 @@ fn test1() {
     {
         let x = ~r(i);
         let y = ~r(j);
-        // Unique boxes containing resources are lowered to pinned kinds,
-        // which can't be swapped
         x <-> y;
         assert ***x == 200;
         assert ***y == 100;