/
Deferred.ts
66 lines (32 loc) 路 1.19 KB
/
Deferred.ts
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
import { overwriteReadonlyProp } from "https://deno.land/x/tsafe@v1.4.1/lab/overwriteReadonlyProp.ts";
export class Deferred<T> {
public readonly pr: Promise<T>;
/** NOTE: Does not need to be called bound to instance*/
public readonly resolve: (value: T)=> void;
public readonly reject: (error: any)=> void;
constructor() {
let resolve!: (value: T)=> void;
let reject!: (error: any)=> void;
this.pr = new Promise<T>(
(resolve_, reject_) => {
resolve = value => {
overwriteReadonlyProp(this, "isPending", false);
resolve_(value);
};
reject = error => {
overwriteReadonlyProp(this, "isPending", false);
reject_(error);
};
}
);
this.resolve = resolve;
this.reject = reject;
}
public readonly isPending: boolean = true;
}
export namespace Deferred {
export type Unpack<T extends Deferred<any>> = T extends Deferred<infer U> ? U : never;
}
export class VoidDeferred extends Deferred<undefined>{
declare public readonly resolve: () => void;
}