import { Retainer, DistinctEqualFn, GroupFn } from "../core";
import { IterableTuple } from "./iterable-tuple";
import { TC39SyncIteratorHelpers } from "../tc39/sync";
export interface ExtendedIterable<T> extends Iterable<T>, TC39SyncIteratorHelpers<T> {
    drain(): boolean;
    hasAny(): boolean;
    union<O>(other: Iterable<O>): ExtendedIterable<T | O>;
    retain(retainer?: Retainer<T>): ExtendedIterable<T>;
    skip(count: number): ExtendedIterable<T>;
    mask(maskIterable: Iterable<boolean>): ExtendedIterable<T>;
    maskReversible(maskIterable: Iterable<boolean>, reverse?: boolean): ExtendedIterable<T>;
    distinct(equalityFn?: DistinctEqualFn<T>): ExtendedIterable<T>;
    group(fn: GroupFn<T, this, this>): ExtendedIterable<ExtendedIterable<T>>;
    tap(fn: (value: T) => void): ExtendedIterable<T>;
    toTuple<S extends number>(size: S): IterableTuple<T, S>;
    toIterable(): Iterable<T>;
}