import type { LazyValue } from '../fn/index.js';
import type { Guard } from '../guard/index.js';
import type { Result } from './result.js';
type Filter = {
    <Res extends Result.Any, Fn extends Guard.Unary, GetErr extends LazyValue>(guard: Fn, getErrValue: GetErr, res: Res): Result<Guard.UnaryType<Fn>, Error>;
    <Res extends Result.Any, Fn extends Guard.Unary, GetErr extends LazyValue>(guard: Fn, getErrValue: GetErr): (res: Res) => Result<Guard.UnaryType<Fn>, Error>;
    <_Res extends Result.Any, Fn extends Guard.Unary, _GetErr extends LazyValue>(guard: Fn): {
        <Res extends Result.Any, Fn extends Guard.Unary, GetErr extends LazyValue>(getErrValue: GetErr): (res: Res) => Result<Guard.UnaryType<Fn>, Error>;
        <Res extends Result.Any, Fn extends Guard.Unary, GetErr extends LazyValue>(getErrValue: GetErr, res: Res): Result<Guard.UnaryType<Fn>, Error>;
    };
};
/**
 * Keep an `Ok` if its value passes the guard function, or return an `Err`
 * containing the result of `getErrValue()`.
 *
 * @tags result, right-biased
 */
export declare const filter: Filter;
export {};