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1 // Copyright 2011 the V8 project authors. All rights reserved. | |
2 // Redistribution and use in source and binary forms, with or without | |
3 // modification, are permitted provided that the following conditions are | |
4 // met: | |
5 // | |
6 // * Redistributions of source code must retain the above copyright | |
7 // notice, this list of conditions and the following disclaimer. | |
8 // * Redistributions in binary form must reproduce the above | |
9 // copyright notice, this list of conditions and the following | |
10 // disclaimer in the documentation and/or other materials provided | |
11 // with the distribution. | |
12 // * Neither the name of Google Inc. nor the names of its | |
13 // contributors may be used to endorse or promote products derived | |
14 // from this software without specific prior written permission. | |
15 // | |
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
27 | |
28 | |
29 // This file relies on the fact that the following declaration has been made | |
30 // in runtime.js: | |
31 // const $Object = global.Object; | |
32 const $WeakMap = global.WeakMap; | |
33 | |
34 // ------------------------------------------------------------------- | |
35 | |
36 function WeakMapConstructor() { | |
37 if (%_IsConstructCall()) { | |
38 %WeakMapInitialize(this); | |
39 } else { | |
40 return new $WeakMap(); | |
41 } | |
42 } | |
43 | |
44 | |
45 function WeakMapGet(key) { | |
46 if (!IS_SPEC_OBJECT(key)) { | |
47 throw %MakeTypeError('invalid_weakmap_key', [this, key]); | |
48 } | |
49 return %WeakMapGet(this, key); | |
50 } | |
51 | |
52 | |
53 function WeakMapSet(key, value) { | |
54 if (!IS_SPEC_OBJECT(key)) { | |
55 throw %MakeTypeError('invalid_weakmap_key', [this, key]); | |
56 } | |
57 return %WeakMapSet(this, key, value); | |
58 } | |
59 | |
60 | |
61 function WeakMapHas(key) { | |
62 if (!IS_SPEC_OBJECT(key)) { | |
63 throw %MakeTypeError('invalid_weakmap_key', [this, key]); | |
64 } | |
65 return !IS_UNDEFINED(%WeakMapGet(this, key)); | |
66 } | |
67 | |
68 | |
69 function WeakMapDelete(key) { | |
70 if (!IS_SPEC_OBJECT(key)) { | |
71 throw %MakeTypeError('invalid_weakmap_key', [this, key]); | |
72 } | |
73 if (!IS_UNDEFINED(%WeakMapGet(this, key))) { | |
74 %WeakMapSet(this, key, void 0); | |
75 return true; | |
76 } else { | |
77 return false; | |
78 } | |
79 } | |
80 | |
81 // ------------------------------------------------------------------- | |
82 | |
83 (function () { | |
84 %CheckIsBootstrapping(); | |
85 // Set up the WeakMap constructor function. | |
86 %SetCode($WeakMap, WeakMapConstructor); | |
87 | |
88 // Set up the constructor property on the WeakMap prototype object. | |
89 %SetProperty($WeakMap.prototype, "constructor", $WeakMap, DONT_ENUM); | |
90 | |
91 // Set up the non-enumerable functions on the WeakMap prototype object. | |
92 InstallFunctionsOnHiddenPrototype($WeakMap.prototype, DONT_ENUM, $Array( | |
93 "get", WeakMapGet, | |
94 "set", WeakMapSet, | |
95 "has", WeakMapHas, | |
96 "delete", WeakMapDelete | |
97 )); | |
98 })(); | |
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