import { Eval } from '@fp4ts/core';
import { Monoid, Ord } from '@fp4ts/cats-kernel';
import { Option } from '../../option';
export declare const toArray: <A>(iter: Iterator<A, any, undefined>) => A[];
export declare const filter: <A>(f: (a: A) => boolean) => (it: Iterator<A>) => Iterator<A>;
export declare const collect: <A, B>(f: (a: A) => Option<B>) => (it: Iterator<A>) => Iterator<B>;
export declare const collectWhile: <A, B>(f: (a: A) => Option<B>) => (it: Iterator<A>) => Iterator<B>;
export declare const map: <A, B>(f: (a: A) => B) => (it: Iterator<A>) => Iterator<B>;
export declare const flatMap: <A, B>(f: (a: A) => Iterator<B>) => (it: Iterator<A>) => Iterator<B>;
export declare const fold: <A, B>(z: B, f: (b: B, a: A) => B) => (it: Iterator<A>) => B;
export declare const scan: <A, B>(z: B, f: (b: B, a: A) => B) => (it: Iterator<A>) => Iterator<B>;
export declare const concat: <AA>(rhs: Iterator<AA>) => <A extends AA>(lhs: Iterator<A>) => Iterator<AA>;
export declare const zipWithIndex: <A>(it: Iterator<A, any, undefined>) => Iterator<[A, number], any, undefined>;
export declare const elem_: <A>(it: Iterator<A, any, undefined>, idx: number) => A | undefined;
export declare const all_: <A>(it: Iterator<A, any, undefined>, p: (a: A) => boolean) => boolean;
export declare const any_: <A>(it: Iterator<A, any, undefined>, p: (a: A) => boolean) => boolean;
export declare const count_: <A>(it: Iterator<A, any, undefined>, p: (a: A) => boolean) => number;
export declare const take_: <A>(it: Iterator<A, any, undefined>, n: number) => Iterator<A, any, undefined>;
export declare const drop_: <A>(it: Iterator<A, any, undefined>, n: number) => Iterator<A, any, undefined>;
export declare const filter_: <A>(it: Iterator<A, any, undefined>, f: (a: A) => boolean) => Iterator<A, any, undefined>;
export declare const collect_: <A, B>(it: Iterator<A, any, undefined>, f: (a: A) => Option<B>) => Iterator<B, any, undefined>;
export declare const collectWhile_: <A, B>(it: Iterator<A, any, undefined>, f: (a: A) => Option<B>) => Iterator<B, any, undefined>;
export declare const map_: <A, B>(it: Iterator<A, any, undefined>, f: (a: A) => B) => Iterator<B, any, undefined>;
export declare const flatMap_: <A, B>(source: Iterator<A, any, undefined>, f: (a: A) => Iterator<B, any, undefined>) => Iterator<B, any, undefined>;
export declare const foldLeft_: <A, B>(it: Iterator<A, any, undefined>, z: B, f: (b: B, a: A) => B) => B;
export declare const foldRight_: <A, B>(it: Iterator<A, any, undefined>, ez: Eval<B>, f: (a: A, eb: Eval<B>) => Eval<B>) => Eval<B>;
export declare const foldMap_: <A, M>(M: Monoid<M>, it: Iterator<A, any, undefined>, f: (a: A) => M) => M;
export declare const foldMapLeft_: <A, M>(M: Monoid<M>, it: Iterator<A, any, undefined>, f: (a: A) => M) => M;
export declare const forEach_: <A>(it: Iterator<A, any, undefined>, f: (a: A) => void) => void;
export declare const scan_: <A, B>(it: Iterator<A, any, undefined>, z: B, f: (b: B, a: A) => B) => Iterator<B, any, undefined>;
export declare const concat_: <A>(lhs: Iterator<A, any, undefined>, rhs: Iterator<A, any, undefined>) => Iterator<A, any, undefined>;
export declare const zip_: <A, B>(lhs: Iterator<A, any, undefined>, rhs: Iterator<B, any, undefined>) => Iterator<[A, B], any, undefined>;
export declare const zipWith_: <A, B>(lhs: Iterator<A, any, undefined>, rhs: Iterator<B, any, undefined>) => <C>(f: (a: A, b: B) => C) => Iterator<C, any, undefined>;
export declare const zipAll_: <A, B>(lhs: Iterator<A, any, undefined>, rhs: Iterator<B, any, undefined>, defaultL: () => A, defaultR: () => B) => Iterator<[A, B], any, undefined>;
export declare const zipAllWith_: <A, B>(lhs: Iterator<A, any, undefined>, rhs: Iterator<B, any, undefined>, defaultL: () => A, defaultR: () => B) => <C>(f: (a: A, b: B) => C) => Iterator<C, any, undefined>;
export declare const distinctBy_: <A, B>(it: Iterator<A, any, undefined>, f: (a: A) => B) => Iterator<A, any, undefined>;
export declare const distinctByOrd_: <A, B>(it: Iterator<A, any, undefined>, f: (a: A) => B, O: Ord<B>) => Iterator<A, any, undefined>;
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