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
|
// Copyright 2016 Microsoft, Inc. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
author: Brian Terlson <brian.terlson@microsoft.com>
esid: sec-async-function-instances
description: >
Async function instances are not constructors and do not have a
[[Construct]] slot.
info: |
25.5.1.1 AsyncFunction( p1, p2, … , pn, body )
...
3. Return CreateDynamicFunction(C, NewTarget, "async", args).
19.2.1.1.1 Runtime Semantics: CreateDynamicFunction( constructor, newTarget, kind, args )
...
33. Perform FunctionInitialize(F, Normal, parameters, body, scope).
34. If kind is "generator", then
...
35. Else if kind is "normal", perform MakeConstructor(F).
36. NOTE: Async functions are not constructable and do not have a [[Construct]] internal method
or a "prototype" property.
...
---*/
async function foo() {}
assert.throws(TypeError, function() {
new foo();
});
var AsyncFunction = Object.getPrototypeOf(foo).constructor;
var instance = AsyncFunction();
assert.throws(TypeError, function() {
new instance();
})
reportCompare(0, 0);
|
