import { IObservable } from '../internal/Observable';
export declare type TMapper<T, R> = (value: T) => R;
export declare type TSource<T> = IObservable<T>;
export declare type TResult<R> = IObservable<R>;
export declare const map: {
    <T, R>(mapper: TMapper<T, R>, source: IObservable<T>): IObservable<R>;
    <T, R>(mapper: TMapper<T, R>): (source: IObservable<T>) => IObservable<R>;
};
export declare const tap: {
    <T>(mapper: TMapper<T, any>, source: IObservable<T>): IObservable<T>;
    <T>(mapper: TMapper<T, any>): (source: IObservable<T>) => IObservable<T>;
};
export declare const mapTo: {
    <T>(value: T, source: IObservable<any>): IObservable<T>;
    <T>(value: T): (source: IObservable<any>) => IObservable<T>;
};