[builtins] implement Array.prototype[@@iterator] in TFJ builtins

src/js/array-iterator.js

Index: src/js/array-iterator.js
diff --git a/src/js/array-iterator.js b/src/js/array-iterator.js
deleted file mode 100644
index 227f733a059150259d55120df60deb30fd9e7938..0000000000000000000000000000000000000000
--- a/src/js/array-iterator.js
+++ /dev/null
@@ -1,168 +0,0 @@
-// 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.
-
-(function(global, utils) {
-
-"use strict";
-
-%CheckIsBootstrapping();
-
-// -----------------------------------------------------------------------
-// Imports
-
-var arrayIterationKindSymbol =
-    utils.ImportNow("array_iteration_kind_symbol");
-var arrayIteratorNextIndexSymbol =
-    utils.ImportNow("array_iterator_next_symbol");
-var arrayIteratorObjectSymbol =
-    utils.ImportNow("array_iterator_object_symbol");
-var GlobalArray = global.Array;
-var IteratorPrototype = utils.ImportNow("IteratorPrototype");
-var iteratorSymbol = utils.ImportNow("iterator_symbol");
-var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
-var GlobalTypedArray = %object_get_prototype_of(global.Uint8Array);
-
-// -----------------------------------------------------------------------
-
-function ArrayIterator() {}
-
-
-// TODO(wingo): Update section numbers when ES6 has stabilized.  The
-// section numbers below are already out of date as of the May 2014
-// draft.
-
-
-// 15.4.5.1 CreateArrayIterator Abstract Operation
-function CreateArrayIterator(array, kind) {
-  var object = TO_OBJECT(array);
-  var iterator = new ArrayIterator;
-  SET_PRIVATE(iterator, arrayIteratorObjectSymbol, object);
-  SET_PRIVATE(iterator, arrayIteratorNextIndexSymbol, 0);
-  SET_PRIVATE(iterator, arrayIterationKindSymbol, kind);
-  return iterator;
-}
-
-
-// 22.1.5.2.2 %ArrayIteratorPrototype%[@@iterator]
-function ArrayIteratorIterator() {
-    return this;
-}
-
-
-// ES6 section 22.1.5.2.1 %ArrayIteratorPrototype%.next( )
-function ArrayIteratorNext() {
-  var iterator = this;
-  var value = UNDEFINED;
-  var done = true;
-
-  if (!IS_RECEIVER(iterator) ||
-      !HAS_DEFINED_PRIVATE(iterator, arrayIteratorNextIndexSymbol)) {
-    throw %make_type_error(kIncompatibleMethodReceiver,
-                        'Array Iterator.prototype.next', this);
-  }
-
-  var array = GET_PRIVATE(iterator, arrayIteratorObjectSymbol);
-  if (!IS_UNDEFINED(array)) {
-    var index = GET_PRIVATE(iterator, arrayIteratorNextIndexSymbol);
-    var itemKind = GET_PRIVATE(iterator, arrayIterationKindSymbol);
-    var length = TO_UINT32(array.length);
-
-    // "sparse" is never used.
-
-    if (index >= length) {
-      SET_PRIVATE(iterator, arrayIteratorObjectSymbol, UNDEFINED);
-    } else {
-      SET_PRIVATE(iterator, arrayIteratorNextIndexSymbol, index + 1);
-
-      if (itemKind == ITERATOR_KIND_VALUES) {
-        value = array[index];
-      } else if (itemKind == ITERATOR_KIND_ENTRIES) {
-        value = [index, array[index]];
-      } else {
-        value = index;
-      }
-      done = false;
-    }
-  }
-
-  return %_CreateIterResultObject(value, done);
-}
-
-
-function ArrayEntries() {
-  return CreateArrayIterator(this, ITERATOR_KIND_ENTRIES);
-}
-
-
-function ArrayValues() {
-  return CreateArrayIterator(this, ITERATOR_KIND_VALUES);
-}
-
-
-function ArrayKeys() {
-  return CreateArrayIterator(this, ITERATOR_KIND_KEYS);
-}
-
-// TODO(littledan): Check for detached TypedArray in these three methods
-function TypedArrayEntries() {
-  if (!IS_TYPEDARRAY(this)) throw %make_type_error(kNotTypedArray);
-  return %_Call(ArrayEntries, this);
-}
-
-
-function TypedArrayValues() {
-  if (!IS_TYPEDARRAY(this)) throw %make_type_error(kNotTypedArray);
-  return %_Call(ArrayValues, this);
-}
-
-
-function TypedArrayKeys() {
-  if (!IS_TYPEDARRAY(this)) throw %make_type_error(kNotTypedArray);
-  return %_Call(ArrayKeys, this);
-}
-
-
-%FunctionSetPrototype(ArrayIterator, {__proto__: IteratorPrototype});
-%FunctionSetInstanceClassName(ArrayIterator, 'Array Iterator');
-
-utils.InstallFunctions(ArrayIterator.prototype, DONT_ENUM, [
-  'next', ArrayIteratorNext
-]);
-utils.SetFunctionName(ArrayIteratorIterator, iteratorSymbol);
-%AddNamedProperty(ArrayIterator.prototype, toStringTagSymbol,
-                  "Array Iterator", READ_ONLY | DONT_ENUM);
-
-utils.InstallFunctions(GlobalArray.prototype, DONT_ENUM, [
-  // No 'values' since it breaks webcompat: http://crbug.com/409858
-  'entries', ArrayEntries,
-  'keys', ArrayKeys
-]);
-
-// TODO(adam): Remove these calls once 'values' is in the above
-// InstallFunctions block, as they'll be redundant.
-utils.SetFunctionName(ArrayValues, 'values');
-%FunctionRemovePrototype(ArrayValues);
-%SetNativeFlag(ArrayValues);
-
-%AddNamedProperty(GlobalArray.prototype, iteratorSymbol, ArrayValues,
-                  DONT_ENUM);
-
-utils.InstallFunctions(GlobalTypedArray.prototype, DONT_ENUM, [
-  'entries', TypedArrayEntries,
-  'keys', TypedArrayKeys,
-  'values', TypedArrayValues
-]);
-%AddNamedProperty(GlobalTypedArray.prototype,
-                  iteratorSymbol, TypedArrayValues, DONT_ENUM);
-
-// -------------------------------------------------------------------
-// Exports
-
-utils.Export(function(to) {
-  to.ArrayValues = ArrayValues;
-});
-
-%InstallToContext(["array_values_iterator", ArrayValues]);
-
-})