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
|
// Copyright (C) 2019 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-async-function-constructor-arguments
description: Default [[Prototype]] value derived from realm of the NewTarget.
info: |
AsyncFunction ( p1, p2, … , pn, body )
...
3. Return CreateDynamicFunction(C, NewTarget, "async", args).
Runtime Semantics: CreateDynamicFunction ( constructor, newTarget, kind, args )
...
9. Else if kind is "async", then
...
c. Let fallbackProto be "%AsyncFunction.prototype%".
...
18. Let proto be ? GetPrototypeFromConstructor(newTarget, fallbackProto).
...
GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
...
3. Let proto be ? Get(constructor, "prototype").
4. If Type(proto) is not Object, then
a. Let realm be ? GetFunctionRealm(constructor).
b. Set proto to realm's intrinsic object named intrinsicDefaultProto.
5. Return proto.
features: [async-functions, cross-realm, Reflect, Symbol]
---*/
var AsyncFunction = Object.getPrototypeOf(async function() {}).constructor;
var other = $262.createRealm().global;
var OtherAsyncFunction = Object.getPrototypeOf(other.eval('(0, async function() {})')).constructor;
var newTarget = new other.Function();
var fn;
newTarget.prototype = undefined;
fn = Reflect.construct(AsyncFunction, [], newTarget);
assert.sameValue(Object.getPrototypeOf(fn), OtherAsyncFunction.prototype, 'newTarget.prototype is undefined');
newTarget.prototype = null;
fn = Reflect.construct(AsyncFunction, [], newTarget);
assert.sameValue(Object.getPrototypeOf(fn), OtherAsyncFunction.prototype, 'newTarget.prototype is null');
newTarget.prototype = true;
fn = Reflect.construct(AsyncFunction, [], newTarget);
assert.sameValue(Object.getPrototypeOf(fn), OtherAsyncFunction.prototype, 'newTarget.prototype is a Boolean');
newTarget.prototype = '';
fn = Reflect.construct(AsyncFunction, [], newTarget);
assert.sameValue(Object.getPrototypeOf(fn), OtherAsyncFunction.prototype, 'newTarget.prototype is a String');
newTarget.prototype = Symbol();
fn = Reflect.construct(AsyncFunction, [], newTarget);
assert.sameValue(Object.getPrototypeOf(fn), OtherAsyncFunction.prototype, 'newTarget.prototype is a Symbol');
newTarget.prototype = 1;
fn = Reflect.construct(AsyncFunction, [], newTarget);
assert.sameValue(Object.getPrototypeOf(fn), OtherAsyncFunction.prototype, 'newTarget.prototype is a Number');
reportCompare(0, 0);
|
