| // 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'; |
| |
| // 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 |
| CHECK_OBJECT_COERCIBLE(this, "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); |
| } |
| |
| var needs_wrapper = false; |
| if (IS_NULL_OR_UNDEFINED(thisArg)) { |
| thisArg = %GetDefaultReceiver(predicate) || thisArg; |
| } else { |
| needs_wrapper = SHOULD_CREATE_WRAPPER(predicate, thisArg); |
| } |
| |
| for (var i = 0; i < length; i++) { |
| if (i in array) { |
| var element = array[i]; |
| var newThisArg = needs_wrapper ? ToObject(thisArg) : thisArg; |
| if (%_CallFunction(newThisArg, element, i, array, predicate)) { |
| return element; |
| } |
| } |
| } |
| |
| return; |
| } |
| |
| |
| // ES6 draft 07-15-13, section 15.4.3.24 |
| function ArrayFindIndex(predicate /* thisArg */) { // length == 1 |
| CHECK_OBJECT_COERCIBLE(this, "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); |
| } |
| |
| var needs_wrapper = false; |
| if (IS_NULL_OR_UNDEFINED(thisArg)) { |
| thisArg = %GetDefaultReceiver(predicate) || thisArg; |
| } else { |
| needs_wrapper = SHOULD_CREATE_WRAPPER(predicate, thisArg); |
| } |
| |
| for (var i = 0; i < length; i++) { |
| if (i in array) { |
| var element = array[i]; |
| var newThisArg = needs_wrapper ? ToObject(thisArg) : thisArg; |
| if (%_CallFunction(newThisArg, element, i, array, predicate)) { |
| return i; |
| } |
| } |
| } |
| |
| return -1; |
| } |
| |
| |
| // ES6, draft 04-05-14, section 22.1.3.6 |
| function ArrayFill(value /* [, start [, end ] ] */) { // length == 1 |
| CHECK_OBJECT_COERCIBLE(this, "Array.prototype.fill"); |
| |
| var array = ToObject(this); |
| var length = TO_UINT32(array.length); |
| |
| var i = 0; |
| var end = length; |
| |
| if (%_ArgumentsLength() > 1) { |
| i = %_Arguments(1); |
| i = IS_UNDEFINED(i) ? 0 : TO_INTEGER(i); |
| if (%_ArgumentsLength() > 2) { |
| end = %_Arguments(2); |
| end = IS_UNDEFINED(end) ? length : TO_INTEGER(end); |
| } |
| } |
| |
| if (i < 0) { |
| i += length; |
| if (i < 0) i = 0; |
| } else { |
| if (i > length) i = length; |
| } |
| |
| if (end < 0) { |
| end += length; |
| if (end < 0) end = 0; |
| } else { |
| if (end > length) end = length; |
| } |
| |
| if ((end - i) > 0 && ObjectIsFrozen(array)) { |
| throw MakeTypeError("array_functions_on_frozen", |
| ["Array.prototype.fill"]); |
| } |
| |
| for (; i < end; i++) |
| array[i] = value; |
| return array; |
| } |
| |
| // ES6, draft 10-14-14, section 22.1.2.1 |
| function ArrayFrom(arrayLike, mapfn, receiver) { |
| var items = ToObject(arrayLike); |
| var mapping = !IS_UNDEFINED(mapfn); |
| |
| if (mapping) { |
| if (!IS_SPEC_FUNCTION(mapfn)) { |
| throw MakeTypeError('called_non_callable', [ mapfn ]); |
| } else if (IS_NULL_OR_UNDEFINED(receiver)) { |
| receiver = %GetDefaultReceiver(mapfn) || receiver; |
| } else if (!IS_SPEC_OBJECT(receiver) && %IsSloppyModeFunction(mapfn)) { |
| receiver = ToObject(receiver); |
| } |
| } |
| |
| var iterable = ToIterable(items); |
| var k; |
| var result; |
| var mappedValue; |
| var nextValue; |
| |
| if (!IS_UNDEFINED(iterable)) { |
| result = IS_SPEC_FUNCTION(this) && this.prototype ? new this() : []; |
| |
| k = 0; |
| for (nextValue of items) { |
| if (mapping) mappedValue = %_CallFunction(receiver, nextValue, k, mapfn); |
| else mappedValue = nextValue; |
| %AddElement(result, k++, mappedValue, NONE); |
| } |
| |
| result.length = k; |
| return result; |
| } else { |
| var len = ToLength(items.length); |
| result = IS_SPEC_FUNCTION(this) && this.prototype ? new this(len) : |
| new $Array(len); |
| |
| for (k = 0; k < len; ++k) { |
| nextValue = items[k]; |
| if (mapping) mappedValue = %_CallFunction(receiver, nextValue, k, mapfn); |
| else mappedValue = nextValue; |
| %AddElement(result, k, mappedValue, NONE); |
| } |
| |
| result.length = k; |
| return result; |
| } |
| } |
| |
| // ES6, draft 05-22-14, section 22.1.2.3 |
| function ArrayOf() { |
| var length = %_ArgumentsLength(); |
| var constructor = this; |
| // TODO: Implement IsConstructor (ES6 section 7.2.5) |
| var array = IS_SPEC_FUNCTION(constructor) ? new constructor(length) : []; |
| for (var i = 0; i < length; i++) { |
| %AddElement(array, i, %_Arguments(i), NONE); |
| } |
| array.length = length; |
| return array; |
| } |
| |
| // ------------------------------------------------------------------- |
| |
| function HarmonyArrayExtendSymbolPrototype() { |
| %CheckIsBootstrapping(); |
| |
| InstallConstants($Symbol, $Array( |
| // TODO(dslomov, caitp): Move to symbol.js when shipping |
| "isConcatSpreadable", symbolIsConcatSpreadable |
| )); |
| } |
| |
| HarmonyArrayExtendSymbolPrototype(); |
| |
| function HarmonyArrayExtendArrayPrototype() { |
| %CheckIsBootstrapping(); |
| |
| %FunctionSetLength(ArrayFrom, 1); |
| |
| // Set up non-enumerable functions on the Array object. |
| InstallFunctions($Array, DONT_ENUM, $Array( |
| "from", ArrayFrom, |
| "of", ArrayOf |
| )); |
| |
| // Set up the non-enumerable functions on the Array prototype object. |
| InstallFunctions($Array.prototype, DONT_ENUM, $Array( |
| "find", ArrayFind, |
| "findIndex", ArrayFindIndex, |
| "fill", ArrayFill |
| )); |
| } |
| |
| HarmonyArrayExtendArrayPrototype(); |