import { Stream } from '@most/types';
import { snapshotTime } from './snapshotTime';
export declare type Behavior<A> = <B>(s: Stream<B>) => Stream<[A, B]>;
export declare const snapshot: <A, B>(b: Behavior<A>, s: Stream<B>) => Stream<[A, B]>;
export declare const sample: <A, B>(b: Behavior<A>, s: Stream<B>) => Stream<A>;
export { snapshotTime as time };
export declare const always: <A>(a: A) => Behavior<A>;
export declare const fromTime: <A>(f: (t: number) => A) => Behavior<A>;
export declare const step: <A>(a: A, sa: Stream<A>) => Behavior<A>;
export declare const map: <A, B>(f: (a: A) => B, ba: Behavior<A>) => Behavior<B>;
export declare const apply: <A, B>(bf: Behavior<(a: A) => B>, ba: Behavior<A>) => Behavior<B>;
export declare const liftA2: <A, B, C>(f: (a: A, b: B) => C, ba: Behavior<A>, bb: Behavior<B>) => Behavior<C>;