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
|
// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-createdynamicfunction
description: >
While default [[Prototype]] value derives from realm of the newTarget,
"prototype" object inherits from %Object.prototype% of constructor's realm.
info: |
Function ( p1, p2, … , pn, body )
[...]
3. Return ? CreateDynamicFunction(C, NewTarget, normal, args).
CreateDynamicFunction ( constructor, newTarget, kind, args )
[...]
18. Let proto be ? GetPrototypeFromConstructor(newTarget, fallbackProto).
19. Let realmF be the current Realm Record.
20. Let scope be realmF.[[GlobalEnv]].
21. Let F be ! OrdinaryFunctionCreate(proto, parameters, body, non-lexical-this, scope).
[...]
25. Else if kind is normal, perform MakeConstructor(F).
[...]
30. Return F.
MakeConstructor ( F [ , writablePrototype [ , prototype ] ] )
[...]
7. If prototype is not present, then
a. Set prototype to OrdinaryObjectCreate(%Object.prototype%).
[...]
8. Perform ! DefinePropertyOrThrow(F, "prototype", PropertyDescriptor {[[Value]]: prototype,
[[Writable]]: writablePrototype, [[Enumerable]]: false, [[Configurable]]: false }).
features: [cross-realm, Reflect]
---*/
var realmA = $262.createRealm().global;
realmA.calls = 0;
var realmB = $262.createRealm().global;
var newTarget = new realmB.Function();
newTarget.prototype = null;
var fn = Reflect.construct(realmA.Function, ["calls += 1;"], newTarget);
assert.sameValue(Object.getPrototypeOf(fn), realmB.Function.prototype);
assert.sameValue(Object.getPrototypeOf(fn.prototype), realmA.Object.prototype);
assert(new fn() instanceof realmA.Object);
assert.sameValue(realmA.calls, 1);
reportCompare(0, 0);
|
