import { Undefinable } from '../Types';
import { IEnumerator } from './_types';
export default abstract class EnumeratorBase<T> implements IEnumerator<T> {
    abstract readonly current: T;
    abstract moveNext(): boolean;
    abstract peek(): Undefinable<T>;
    abstract reset(): void;
    next(): IteratorResult<T, T>;
    readonly return?: (value?: T) => IteratorResult<T, T>;
    readonly throw?: (e?: T) => IteratorResult<T, T>;
}