Move toString() to collection classes.

sdk/lib/collection/hash_set.dart

Index: sdk/lib/collection/hash_set.dart
diff --git a/sdk/lib/collection/hash_set.dart b/sdk/lib/collection/hash_set.dart
index 86c69c81ee5f4346fea08f0b42fbfc8bec58300f..c30f1bffdada1bf9882a96e5513bf2bdd4202f00 100644
--- a/sdk/lib/collection/hash_set.dart
+++ b/sdk/lib/collection/hash_set.dart
@@ -6,6 +6,8 @@ part of dart.collection;
 
 /** Common parts of [HashSet] and [LinkedHashSet] implementations. */
 abstract class _HashSetBase<E> extends IterableBase<E> implements Set<E> {
+  static List _toStringList = new List();
+
   // Set.
   bool containsAll(Iterable<Object> other) {
     for (Object object in other) {
@@ -53,7 +55,17 @@ abstract class _HashSetBase<E> extends IterableBase<E> implements Set<E> {
     retainWhere(retainSet.contains);
   }
 
-  String toString() => ToString.iterableToString(this);
+  String toString() {
+    for(int i = 0; i < _toStringList.length; i++) {
+      if(identical(_toStringList[i], this))
+          return '{...}';
+    }
+    _toStringList.add(this);
+    String result = IterableMixinWorkaround.toStringIterable(this);
+    _toStringList.remove(this);

[floitsch, 2013/07/08 12:00:50]

Same comments as before.

[zarah, 2013/07/08 14:35:15]

Done.

+    print(result);

[floitsch, 2013/07/08 12:00:50]

Remove debug print.

[zarah, 2013/07/08 14:35:15]

Done.

+    return result;
+  }
 }
 
 /**