import { Future } from './index.cjs';

type FuturifyArgs<Args extends any[]> = {
    [K in keyof Args]: Args[K] | Future<Args[K]>;
};
type FuturifyReturn<R> = R extends Promise<infer U> ? Future<U> : Future<R>;
type FuturifyOverload<F extends (...args: any[]) => any> = (...args: FuturifyArgs<Parameters<F>>) => FuturifyReturn<ReturnType<F>>;
type Futurified<F> = F extends {
    (...args: infer A1): infer R1;
    (...args: infer A2): infer R2;
    (...args: infer A3): infer R3;
    (...args: infer A4): infer R4;
    (...args: infer A5): infer R5;
} ? FuturifyOverload<(...args: A1) => R1> & FuturifyOverload<(...args: A2) => R2> & FuturifyOverload<(...args: A3) => R3> & FuturifyOverload<(...args: A4) => R4> & FuturifyOverload<(...args: A5) => R5> : F extends (...args: infer A) => infer R ? FuturifyOverload<F> : never;
declare function futurify<F extends (...args: any[]) => any>(fn: F): Futurified<F>;

export { futurify };