import { AnyIterable } from './internalTypes';
export declare function reduceSync<T>(iter: Iterable<T>, reduceFn: (prev: T, curr: T) => T): T | undefined;
export declare function reduceSync<T>(iter: Iterable<T>, reduceFn: (prev: T, curr: T) => T, initialValue: T): T;
export declare function reduceSync<T>(iter: Iterable<T>, reduceFn: (prev: T, curr: T) => T, initialValue?: T): T | undefined;
export declare function reduceSync<T, U>(iter: Iterable<T>, reduceFn: (prev: U, curr: T) => U, initialValue: U): U;
export declare function reduceAsync<T>(iter: AnyIterable<T>, reduceFn: (prev: T, curr: T) => T): Promise<T | undefined>;
export declare function reduceAsync<T>(iter: AnyIterable<T>, reduceFn: (prev: T, curr: T) => T, initialValue: T): Promise<T>;
export declare function reduceAsync<T>(iter: AnyIterable<T>, reduceFn: (prev: T, curr: T) => T, initialValue?: T): Promise<T | undefined>;
export declare function reduceAsync<T, U>(iter: AnyIterable<T>, reduceFn: (prev: U, curr: T) => U, initialValue: U): Promise<U>;
export declare function reduce<T>(iter: Iterable<T>, reduceFn: (prev: T, curr: T) => T): T | undefined;
export declare function reduce<T>(iter: Iterable<T>, reduceFn: (prev: T, curr: T) => T, initialValue: T): T;
export declare function reduce<T, U>(iter: Iterable<T>, reduceFn: (prev: U, curr: T) => U, initialValue: U): U;
export declare function reduce<T>(iter: AsyncIterable<T>, reduceFn: (prev: T, curr: T) => T): Promise<T | undefined>;
export declare function reduce<T>(iter: AsyncIterable<T>, reduceFn: (prev: T, curr: T) => T, initialValue: T): Promise<T>;
export declare function reduce<T, U>(iter: AsyncIterable<T>, reduceFn: (prev: U, curr: T) => U, initialValue: U): Promise<U>;
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