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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 // | 4 // |
5 | 5 |
6 (function(global, utils) { | 6 (function(global, utils) { |
7 | 7 |
8 "use strict"; | 8 "use strict"; |
9 | 9 |
10 %CheckIsBootstrapping(); | 10 %CheckIsBootstrapping(); |
11 | 11 |
| 12 // ------------------------------------------------------------------- |
| 13 // Imports |
| 14 |
12 var GlobalObject = global.Object; | 15 var GlobalObject = global.Object; |
13 | 16 |
| 17 var OwnPropertyKeys; |
| 18 |
| 19 utils.Import(function(from) { |
| 20 OwnPropertyKeys = from.OwnPropertyKeys; |
| 21 }); |
| 22 |
| 23 // ------------------------------------------------------------------- |
| 24 |
14 // ES6, draft 04-03-15, section 19.1.2.1 | 25 // ES6, draft 04-03-15, section 19.1.2.1 |
15 function ObjectAssign(target, sources) { | 26 function ObjectAssign(target, sources) { |
16 var to = TO_OBJECT_INLINE(target); | 27 var to = TO_OBJECT_INLINE(target); |
17 var argsLen = %_ArgumentsLength(); | 28 var argsLen = %_ArgumentsLength(); |
18 if (argsLen < 2) return to; | 29 if (argsLen < 2) return to; |
19 | 30 |
20 for (var i = 1; i < argsLen; ++i) { | 31 for (var i = 1; i < argsLen; ++i) { |
21 var nextSource = %_Arguments(i); | 32 var nextSource = %_Arguments(i); |
22 if (IS_NULL_OR_UNDEFINED(nextSource)) { | 33 if (IS_NULL_OR_UNDEFINED(nextSource)) { |
23 continue; | 34 continue; |
24 } | 35 } |
25 | 36 |
26 var from = TO_OBJECT_INLINE(nextSource); | 37 var from = TO_OBJECT_INLINE(nextSource); |
27 var keys = $ownPropertyKeys(from); | 38 var keys = OwnPropertyKeys(from); |
28 var len = keys.length; | 39 var len = keys.length; |
29 | 40 |
30 for (var j = 0; j < len; ++j) { | 41 for (var j = 0; j < len; ++j) { |
31 var key = keys[j]; | 42 var key = keys[j]; |
32 if (%IsPropertyEnumerable(from, key)) { | 43 if (%IsPropertyEnumerable(from, key)) { |
33 var propValue = from[key]; | 44 var propValue = from[key]; |
34 to[key] = propValue; | 45 to[key] = propValue; |
35 } | 46 } |
36 } | 47 } |
37 } | 48 } |
38 return to; | 49 return to; |
39 } | 50 } |
40 | 51 |
41 // Set up non-enumerable functions on the Object object. | 52 // Set up non-enumerable functions on the Object object. |
42 $installFunctions(GlobalObject, DONT_ENUM, [ | 53 utils.InstallFunctions(GlobalObject, DONT_ENUM, [ |
43 "assign", ObjectAssign | 54 "assign", ObjectAssign |
44 ]); | 55 ]); |
45 | 56 |
46 }) | 57 }) |
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