The Tor Browser / file comparison
comparison: js/src/builtin/Iterator.js
js/src/builtin/Iterator.js
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:281f0ca8a125 |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 function IteratorIdentity() { | |
| 6 return this; | |
| 7 } | |
| 8 | |
| 9 var LegacyIteratorWrapperMap = new std_WeakMap(); | |
| 10 | |
| 11 function LegacyIteratorNext(arg) { | |
| 12 var iter = callFunction(std_WeakMap_get, LegacyIteratorWrapperMap, this); | |
| 13 try { | |
| 14 return { value: iter.next(arg), done: false }; | |
| 15 } catch (e) { | |
| 16 if (e instanceof std_StopIteration) | |
| 17 return { value: undefined, done: true }; | |
| 18 throw e; | |
| 19 } | |
| 20 } | |
| 21 | |
| 22 function LegacyIteratorThrow(exn) { | |
| 23 var iter = callFunction(std_WeakMap_get, LegacyIteratorWrapperMap, this); | |
| 24 try { | |
| 25 return { value: iter.throw(exn), done: false }; | |
| 26 } catch (e) { | |
| 27 if (e instanceof std_StopIteration) | |
| 28 return { value: undefined, done: true }; | |
| 29 throw e; | |
| 30 } | |
| 31 } | |
| 32 | |
| 33 function LegacyIterator(iter) { | |
| 34 callFunction(std_WeakMap_set, LegacyIteratorWrapperMap, this, iter); | |
| 35 } | |
| 36 | |
| 37 function LegacyGeneratorIterator(iter) { | |
| 38 callFunction(std_WeakMap_set, LegacyIteratorWrapperMap, this, iter); | |
| 39 } | |
| 40 | |
| 41 var LegacyIteratorsInitialized = std_Object_create(null); | |
| 42 | |
| 43 function InitLegacyIterators() { | |
| 44 var props = std_Object_create(null); | |
| 45 | |
| 46 props.next = std_Object_create(null); | |
| 47 props.next.value = LegacyIteratorNext; | |
| 48 props.next.enumerable = false; | |
| 49 props.next.configurable = true; | |
| 50 props.next.writable = true; | |
| 51 | |
| 52 props[std_iterator] = std_Object_create(null); | |
| 53 props[std_iterator].value = IteratorIdentity; | |
| 54 props[std_iterator].enumerable = false; | |
| 55 props[std_iterator].configurable = true; | |
| 56 props[std_iterator].writable = true; | |
| 57 | |
| 58 var LegacyIteratorProto = std_Object_create(GetIteratorPrototype(), props); | |
| 59 MakeConstructible(LegacyIterator, LegacyIteratorProto); | |
| 60 | |
| 61 props.throw = std_Object_create(null); | |
| 62 props.throw.value = LegacyIteratorThrow; | |
| 63 props.throw.enumerable = false; | |
| 64 props.throw.configurable = true; | |
| 65 props.throw.writable = true; | |
| 66 | |
| 67 var LegacyGeneratorIteratorProto = std_Object_create(GetIteratorPrototype(), props); | |
| 68 MakeConstructible(LegacyGeneratorIterator, LegacyGeneratorIteratorProto); | |
| 69 | |
| 70 LegacyIteratorsInitialized.initialized = true; | |
| 71 } | |
| 72 | |
| 73 function NewLegacyIterator(iter, wrapper) { | |
| 74 if (!LegacyIteratorsInitialized.initialized) | |
| 75 InitLegacyIterators(); | |
| 76 | |
| 77 return new wrapper(iter); | |
| 78 } | |
| 79 | |
| 80 function LegacyIteratorShim() { | |
| 81 return NewLegacyIterator(ToObject(this), LegacyIterator); | |
| 82 } | |
| 83 | |
| 84 function LegacyGeneratorIteratorShim() { | |
| 85 return NewLegacyIterator(ToObject(this), LegacyGeneratorIterator); | |
| 86 } |
