import type { IsomorphicIterable, Reducer } from "@vangware/types";
import type { ReducerOutput } from "./types/ReducerOutput.js";
/**
 * Reducer function for iterables and asynchronous iterables.
 *
 * @category Reducers
 * @example
 * ```
 * const sum = Accumulator<number>(item => total => total + item);
 * const sumFrom0 = sum(0);
 *
 * sumFrom0([1, 2, 3]); // 6
 * ```
 * @param reducer Reducer function.
 * @returns Curried function with `reducer` in context.
 */
export declare const reduce: <Item, Accumulator>(
	reducer: Reducer<Item, Accumulator>,
) => (
	initialValue: Accumulator,
) => <Iterable_1 extends IsomorphicIterable<Item>>(
	iterable: Iterable_1,
) => ReducerOutput<Iterable_1, Accumulator>;