import type { IStream } from '../types.js';
/**
 * Replace all values in a stream with a constant
 *
 * stream:      -a-b-c-d->
 * constant(x): -x-x-x-x->
 */
export declare const constant: IConstantCurry;
/**
 * Prepend a value to the beginning of a stream
 *
 * stream:   -x-y-z->
 * start(a): ax-y-z->
 */
export declare const start: IStartCurry;
export interface IStartCurry {
    <A, B>(value: A, stream: IStream<B>): IStream<A | B>;
    <A, B>(value: A): (stream: IStream<B>) => IStream<A | B>;
}
export interface IConstantCurry {
    <T>(value: T, stream: IStream<any>): IStream<T>;
    <T>(value: T): (stream: IStream<any>) => IStream<T>;
}