34 lines
959 B
TypeScript
34 lines
959 B
TypeScript
export function todo<T>(msg?: string): T {
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class NotImplemented extends Error {}
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throw new NotImplemented(msg);
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}
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export function exhausted(_: never) {
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class Unexhausted extends Error {}
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throw new Unexhausted();
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}
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export type Res<V, E> = Ok<V> | Err<E>;
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export type Ok<V> = { ok: true; val: V };
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export type Err<E> = { ok: false; val: E };
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export const Ok = <V>(val: V): Ok<V> => ({ ok: true, val });
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export const Err = <E>(val: E): Err<E> => ({ ok: false, val });
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export const Res = { Ok, Err } as const;
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export type ControlFlow<
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R = undefined,
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V = undefined,
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> = Break<R> | Continue<V>;
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export type Break<R> = { break: true; val: R };
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export type Continue<V> = { break: false; val: V };
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export const ControlFlow = {
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Break: <R>(val: R): Break<R> => ({ break: true, val }),
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Continue: <V>(val: V): Continue<V> => ({ break: false, val }),
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} as const;
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export const range = (length: number) => (new Array(length).fill(0));
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