blob: f9ac95c0b5626ff5c5fa070bbabb734f9c2b28b3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
export interface Maybe<T> {
isJust(): this is Just<T>;
}
export type Just<T> = Maybe<T> & {
get(): T
};
export function just<T>(value: T): Just<T> {
return {
isJust: () => true,
get: () => value
};
}
export function nothing<T>(): Maybe<T> {
return {
isJust: () => false,
};
}
|
