ES6: Add support for Map.prototype.forEach and Set.prototype.forEach

src/factory.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "factory.h"
 
 #include "isolate-inl.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 1978 matching lines @@
   if (String::Equals(name, nan_string())) return nan_value();
   if (String::Equals(name, infinity_string())) return infinity_value();
   return Handle<Object>::null();
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
+Handle<JSObject> Factory::CreateIteratorResultObject(Handle<Object> value,
+                                                     bool done) {
+  Handle<Map> map(isolate()->native_context()->iterator_result_map());
+  Handle<JSObject> result = NewJSObjectFromMap(map, NOT_TENURED, false);
+  JSObject::SetProperty(
+      result,
+      InternalizeOneByteString(STATIC_ASCII_VECTOR("value")),

[adamk, 2014/04/14 19:15:42]

"value" and "done" are already available in the heap, and you can get a handle
for them from the factory by calling value_string() and done_string() methods on
this.

[arv (Not doing code reviews), 2014/04/14 19:51:49]

Done.

+      value,
+      NONE,
+      SLOPPY).Assert();
+  JSObject::SetProperty(
+      result,
+      InternalizeOneByteString(STATIC_ASCII_VECTOR("done")),
+      ToBoolean(done),
+      NONE,
+      SLOPPY).Assert();
+  return result;
+}
+
 } }  // namespace v8::internal