Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | (function(global, utils) { |
| 6 | |
| 7 | 'use strict'; |
| 8 | |
| 9 | // ------------------------------------------------------------------- |
| 10 | // Imports |
| 11 | var InternalArray = utils.InternalArray; |
| 12 | var MakeTypeError; |
| 13 | |
| 14 | utils.Import(function(from) { |
| 15 | MakeTypeError = from.MakeTypeError; |
| 16 | }); |
| 17 | |
| 18 | // ------------------------------------------------------------------- |
| 19 | |
| 20 | function SpreadArguments() { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 21 | var count = arguments.length; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 22 | var args = new InternalArray(); |
| 23 | |
| 24 | for (var i = 0; i < count; ++i) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 25 | var array = arguments[i]; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 26 | var length = array.length; |
| 27 | for (var j = 0; j < length; ++j) { |
| 28 | args.push(array[j]); |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | return args; |
| 33 | } |
| 34 | |
| 35 | |
| 36 | function SpreadIterable(collection) { |
| 37 | if (IS_NULL_OR_UNDEFINED(collection)) { |
| 38 | throw MakeTypeError(kNotIterable, collection); |
| 39 | } |
| 40 | |
| 41 | var args = new InternalArray(); |
| 42 | for (var value of collection) { |
| 43 | args.push(value); |
| 44 | } |
| 45 | return args; |
| 46 | } |
| 47 | |
| 48 | // ---------------------------------------------------------------------------- |
| 49 | // Exports |
| 50 | |
| 51 | %InstallToContext([ |
| 52 | "spread_arguments", SpreadArguments, |
| 53 | "spread_iterable", SpreadIterable, |
| 54 | ]); |
| 55 | |
| 56 | }) |