forked from firefox-devtools/debugger
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathasync-value.js
More file actions
39 lines (35 loc) · 1.13 KB
/
async-value.js
File metadata and controls
39 lines (35 loc) · 1.13 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
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
// @flow
export type FulfilledValue<+T> = {|
state: "fulfilled",
+value: T
|};
export type RejectedValue = {|
state: "rejected",
value: mixed
|};
export type PendingValue = {|
state: "pending"
|};
export type SettledValue<+T> = FulfilledValue<T> | RejectedValue;
export type AsyncValue<+T> = SettledValue<T> | PendingValue;
export function pending(): PendingValue {
return { state: "pending" };
}
export function fulfilled<+T>(value: T): FulfilledValue<T> {
return { state: "fulfilled", value };
}
export function rejected(value: mixed): RejectedValue {
return { state: "rejected", value };
}
export function isPending(value: AsyncValue<mixed>): boolean %checks {
return value.state === "pending";
}
export function isFulfilled(value: AsyncValue<mixed>): boolean %checks {
return value.state === "fulfilled";
}
export function isRejected(value: AsyncValue<mixed>): boolean %checks {
return value.state === "rejected";
}