import type { AnyAsyncFunction, AnySyncFunction } from './types/common.js';
export type OkResult<T> = Readonly<{
    ok: T;
    isOk: true;
    isError: false;
}>;
export type ErrorResult<E> = Readonly<{
    error: E;
    isOk: false;
    isError: true;
}>;
export type Result<T, E> = OkResult<T> | ErrorResult<E>;
export type ResultifiedSyncFn<Fn extends AnySyncFunction> = (...args: Parameters<Fn>) => Result<ReturnType<Fn>, Error>;
export declare function resultify<Fn extends AnySyncFunction>(fn: Fn): ResultifiedSyncFn<Fn>;
export type ResultifiedAsyncFn<Fn extends AnyAsyncFunction> = (...args: Parameters<Fn>) => Promise<Result<Awaited<ReturnType<Fn>>, Error>>;
export declare const resultifyAsync: <Fn extends AnyAsyncFunction>(fn: Fn) => ResultifiedAsyncFn<Fn>;