import { Observable } from "../Observable";
import { Property } from "../Property";
export declare type Falsy = 0 | false | null | "" | undefined;
export declare type Result<A, B> = A extends Falsy ? A : (Exclude<A, Falsy> | B);
export declare const and: CurriedAnd;
export interface CurriedAnd {
    <A, B>(a: Observable<A>, b: Observable<B>): Property<Result<A, B>>;
    <A, B>(a: Observable<A>): (b: Observable<B>) => Property<Result<A, B>>;
}
export declare const or: CurriedOr;
export interface CurriedOr {
    <A, B>(a: Observable<A>, b: Observable<B>): Property<Result<A, B>>;
    <A, B>(a: Observable<A>): (b: Observable<B>) => Property<Result<A, B>>;
}
export declare function not<A>(a: Observable<A>): Observable<boolean>;