Index: src/harmony-spread.js |
diff --git a/src/harmony-spread.js b/src/harmony-spread.js |
new file mode 100644 |
index 0000000000000000000000000000000000000000..82509993b1b3d7a76d51363a571989b587dc76a3 |
--- /dev/null |
+++ b/src/harmony-spread.js |
@@ -0,0 +1,44 @@ |
+// Copyright 2013 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. |
+ |
+'use strict'; |
+ |
+var SpreadArguments; |
+var SpreadIterable; |
+ |
+ |
+function SetupSpreadHelpers() { |
+ %CheckIsBootstrapping(); |
+ |
+ if (SpreadArguments) return; |
+ |
+ SpreadArguments = function spreadArguments() { |
+ var count = %_ArgumentsLength(); |
+ var args = new InternalArray(); |
+ |
+ for (var i = 0; i < count; ++i) { |
+ var array = %_Arguments(i); |
+ var length = array.length; |
+ for (var j = 0; j < length; ++j) { |
+ args.push(array[j]); |
+ } |
+ } |
+ |
+ return args; |
+ } |
+ |
+ SpreadIterable = function spreadIterable(collection) { |
+ if (IS_NULL_OR_UNDEFINED(collection)) { |
arv (Not doing code reviews)
2015/03/30 22:19:49
Isn't this is already tested by for-of?
caitp (gmail)
2015/03/30 22:38:12
at the time I wrote it, it was a reference error t
|
+ throw MakeTypeError("not_iterable", [collection]); |
+ } |
+ |
+ var args = new InternalArray(); |
+ for (var value of collection) { |
+ args.push(value); |
+ } |
+ return args; |
+ } |
+} |
+ |
+SetupSpreadHelpers(); |