import { Observable } from "../Observable";
export interface DoActionOp {
    <T>(f: (val: T) => void, observable: Observable<T>): Observable<T>;
    <T>(f: (val: T) => void): (observable: Observable<T>) => Observable<T>;
}
export interface DoErrorOp {
    <T>(f: (err: Error) => void, observable: Observable<T>): Observable<T>;
    <T>(f: (err: Error) => void): (observable: Observable<T>) => Observable<T>;
}
export interface DoEndOp {
    <T>(f: () => void, observable: Observable<T>): Observable<T>;
    <T>(f: () => void): (observable: Observable<T>) => Observable<T>;
}
export interface DoLogOp {
    <T>(label: string | undefined, observable: Observable<T>): Observable<T>;
    <T>(label: string | undefined): (observable: Observable<T>) => Observable<T>;
}
export declare const doAction: DoActionOp;
export declare const doError: DoErrorOp;
export declare const doEnd: DoEndOp;
export declare const doLog: DoLogOp;