-
Notifications
You must be signed in to change notification settings - Fork 1.9k
Expand file tree
/
Copy pathAsyncIteratorPrototype.js
More file actions
75 lines (69 loc) · 2.75 KB
/
AsyncIteratorPrototype.js
File metadata and controls
75 lines (69 loc) · 2.75 KB
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
/*
* Copyright (C) 2025 Sosuke Suzuki <aosukeke@gmail.com>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
@linkTimeConstant
function promiseReturnUndefinedOnFulfilled(argument)
{
"use strict";
return @undefined;
}
// https://tc39.es/proposal-explicit-resource-management/#sec-%asynciteratorprototype%-@@asyncdispose
@overriddenName="[Symbol.asyncDispose]"
function asyncDispose()
{
'use strict';
var promise = @newPromise();
var returnMethod;
try {
returnMethod = this.return;
} catch (e) {
@rejectPromiseWithFirstResolvingFunctionCallCheck(promise, e);
return promise;
}
if (@isUndefinedOrNull(returnMethod))
@resolvePromiseWithFirstResolvingFunctionCallCheck(promise, @undefined);
else {
var result;
try {
result = returnMethod.@call(this, @undefined);
} catch (e) {
@rejectPromiseWithFirstResolvingFunctionCallCheck(promise, e);
return promise;
}
var resultWrapper;
try {
if (@isPromise(result) && result.constructor == @Promise)
resultWrapper = result;
else {
resultWrapper = @newPromise();
@resolvePromiseWithFirstResolvingFunctionCallCheck(resultWrapper, result);
}
} catch (e) {
@rejectPromiseWithFirstResolvingFunctionCallCheck(promise, e);
return promise;
}
@performPromiseThen(resultWrapper, @promiseReturnUndefinedOnFulfilled, @undefined, promise);
}
return promise;
}