1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This file relies on the fact that the following declaration has been made
// in runtime.js:
// const $Object = global.Object;
const $WeakMap = global.WeakMap;
// -------------------------------------------------------------------
function WeakMapConstructor() {
if (%_IsConstructCall()) {
%WeakMapInitialize(this);
} else {
return new $WeakMap();
}
}
function WeakMapGet(key) {
if (!IS_SPEC_OBJECT(key)) {
throw %MakeTypeError('invalid_weakmap_key', [this, key]);
}
return %WeakMapGet(this, key);
}
function WeakMapSet(key, value) {
if (!IS_SPEC_OBJECT(key)) {
throw %MakeTypeError('invalid_weakmap_key', [this, key]);
}
return %WeakMapSet(this, key, value);
}
function WeakMapHas(key) {
if (!IS_SPEC_OBJECT(key)) {
throw %MakeTypeError('invalid_weakmap_key', [this, key]);
}
return !IS_UNDEFINED(%WeakMapGet(this, key));
}
function WeakMapDelete(key) {
if (!IS_SPEC_OBJECT(key)) {
throw %MakeTypeError('invalid_weakmap_key', [this, key]);
}
if (!IS_UNDEFINED(%WeakMapGet(this, key))) {
%WeakMapSet(this, key, void 0);
return true;
} else {
return false;
}
}
// -------------------------------------------------------------------
(function () {
%CheckIsBootstrapping();
// Set up the WeakMap constructor function.
%SetCode($WeakMap, WeakMapConstructor);
// Set up the WeakMap prototype object.
%FunctionSetPrototype($WeakMap, new $WeakMap());
// Set up the constructor property on the WeakMap prototype object.
%SetProperty($WeakMap.prototype, "constructor", $WeakMap, DONT_ENUM);
// Set up the non-enumerable functions on the WeakMap prototype object.
InstallFunctionsOnHiddenPrototype($WeakMap.prototype, DONT_ENUM, $Array(
"get", WeakMapGet,
"set", WeakMapSet,
"has", WeakMapHas,
"delete", WeakMapDelete
));
})();
|
