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Unified Diff: src/harmony-array.js

Issue 21079003: Add new Harmony methods to Array.prototype object. (Closed) Base URL: git://github.com/v8/v8.git@master
Patch Set: review changes Created 7 years, 5 months ago
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Index: src/harmony-array.js
diff --git a/src/harmony-array.js b/src/harmony-array.js
new file mode 100644
index 0000000000000000000000000000000000000000..e440299ff6152a39cc1bfcc886e1e6de2ff1ec1c
--- /dev/null
+++ b/src/harmony-array.js
@@ -0,0 +1,124 @@
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following
+// disclaimer in the documentation and/or other materials provided
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+'use strict';
+
+// This file relies on the fact that the following declaration has been made
+// in runtime.js:
+// var $Array = global.Array;
+
+// -------------------------------------------------------------------
+
+// ES6 draft 07-15-13, section 15.4.3.23
+function ArrayFind(predicate /* thisArg */) { // length == 1
+ if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
+ throw MakeTypeError("called_on_null_or_undefined",
+ ["Array.prototype.find"]);
+ }
+
+ var array = ToObject(this);
+ var length = ToInteger(array.length);
+
+ if (!IS_SPEC_FUNCTION(predicate)) {
+ throw MakeTypeError('called_non_callable', [predicate]);
+ }
+
+ var thisArg;
+ if (%_ArgumentsLength() > 1) {
+ thisArg = %_Arguments(1);
+ }
+
+ if (IS_NULL_OR_UNDEFINED(thisArg)) {
+ thisArg = %GetDefaultReceiver(predicate) || thisArg;
+ } else if (!IS_SPEC_OBJECT(thisArg) && %IsClassicModeFunction(predicate)) {
+ thisArg = ToObject(thisArg);
+ }
+
+ for (var i = 0; i < length; i++) {
+ if (i in array) {
+ var element = array[i];
+ if (%_CallFunction(thisArg, element, i, array, predicate)) {
+ return element;
+ }
+ }
+ }
+
+ return;
+}
+
+
+// ES6 draft 07-15-13, section 15.4.3.24
+function ArrayFindIndex(predicate /* thisArg */) { // length == 1
+ if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
+ throw MakeTypeError("called_on_null_or_undefined",
+ ["Array.prototype.findIndex"]);
+ }
+
+ var array = ToObject(this);
+ var length = ToInteger(array.length);
+
+ if (!IS_SPEC_FUNCTION(predicate)) {
+ throw MakeTypeError('called_non_callable', [predicate]);
+ }
+
+ var thisArg;
+ if (%_ArgumentsLength() > 1) {
+ thisArg = %_Arguments(1);
+ }
+
+ if (IS_NULL_OR_UNDEFINED(thisArg)) {
+ thisArg = %GetDefaultReceiver(predicate) || thisArg;
+ } else if (!IS_SPEC_OBJECT(thisArg) && %IsClassicModeFunction(predicate)) {
+ thisArg = ToObject(thisArg);
+ }
+
+ for (var i = 0; i < length; i++) {
+ if (i in array) {
+ var element = array[i];
+ if (%_CallFunction(thisArg, element, i, array, predicate)) {
+ return i;
+ }
+ }
+ }
+
+ return -1;
+}
+
+
+// -------------------------------------------------------------------
+
+function HarmonyArrayExtendArrayPrototype() {
+ %CheckIsBootstrapping();
+
+ // Set up the non-enumerable functions on the Array prototype object.
+ InstallFunctions($Array.prototype, DONT_ENUM, $Array(
+ "find", ArrayFind,
+ "findIndex", ArrayFindIndex
+ ));
+}
+
+HarmonyArrayExtendArrayPrototype();
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