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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | 58x 2419x 7580x 7580x 2416x 58x 7580x 7580x 58x | export type UndefIterator<T> = () => undefined | T;
export class UndefEndIter<T> implements IterableIterator<T> {
constructor(private readonly i: UndefIterator<T>) {}
public next(): IteratorResult<T, T> {
const value = this.i();
return new IterRes(value, value === undefined) as IteratorResult<T>;
}
[Symbol.iterator]() {
return this;
}
}
export class IterRes<T> {
constructor(
public readonly value: T,
public readonly done: boolean,
) {}
}
export const iter = <T>(i: UndefIterator<T>) => new UndefEndIter(i);
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