/**
 * @since 2.11.0
 */
import { HKT, Kind, Kind2, Kind3, Kind4, URIS, URIS2, URIS3, URIS4 } from './HKT.js';
import { Pointed, Pointed1, Pointed2, Pointed2C, Pointed3, Pointed3C, Pointed4 } from './Pointed.js';
/**
 * @category model
 * @since 2.11.0
 */
export interface Zero<F> {
    readonly URI: F;
    readonly zero: <A>() => HKT<F, A>;
}
/**
 * @category model
 * @since 2.11.0
 */
export interface Zero1<F extends URIS> {
    readonly URI: F;
    readonly zero: <A>() => Kind<F, A>;
}
/**
 * @category model
 * @since 2.11.0
 */
export interface Zero2<F extends URIS2> {
    readonly URI: F;
    readonly zero: <E, A>() => Kind2<F, E, A>;
}
/**
 * @category model
 * @since 2.11.0
 */
export interface Zero2C<F extends URIS2, E> {
    readonly URI: F;
    readonly _E: E;
    readonly zero: <A>() => Kind2<F, E, A>;
}
/**
 * @category model
 * @since 2.11.0
 */
export interface Zero3<F extends URIS3> {
    readonly URI: F;
    readonly zero: <R, E, A>() => Kind3<F, R, E, A>;
}
/**
 * @category model
 * @since 2.11.0
 */
export interface Zero3C<F extends URIS3, E> {
    readonly URI: F;
    readonly _E: E;
    readonly zero: <R, A>() => Kind3<F, R, E, A>;
}
/**
 * @category model
 * @since 2.11.0
 */
export interface Zero4<F extends URIS4> {
    readonly URI: F;
    readonly zero: <S, R, E, A>() => Kind4<F, S, R, E, A>;
}
/**
 * @category do notation
 * @since 2.11.0
 */
export declare function guard<F extends URIS4>(F: Zero4<F>, P: Pointed4<F>): <S, R, E>(b: boolean) => Kind4<F, S, R, E, void>;
export declare function guard<F extends URIS3>(F: Zero3<F>, P: Pointed3<F>): <R, E>(b: boolean) => Kind3<F, R, E, void>;
export declare function guard<F extends URIS3, E>(F: Zero3C<F, E>, P: Pointed3C<F, E>): <R>(b: boolean) => Kind3<F, R, E, void>;
export declare function guard<F extends URIS2>(F: Zero2<F>, P: Pointed2<F>): <E>(b: boolean) => Kind2<F, E, void>;
export declare function guard<F extends URIS2, E>(F: Zero2C<F, E>, P: Pointed2C<F, E>): (b: boolean) => Kind2<F, E, void>;
export declare function guard<F extends URIS>(F: Zero1<F>, P: Pointed1<F>): (b: boolean) => Kind<F, void>;
export declare function guard<F>(F: Zero<F>, P: Pointed<F>): (b: boolean) => HKT<F, void>;