export declare type Flag<T, N extends string> = (args: string[]) => ParseResult<T, N>;
export declare type ParseResult<T, N extends string> = {
    [key in N]: {
        value?: T;
        option: FlagOption<T>;
        position?: number[];
    };
};
export declare type NumberFlag<N extends string> = Flag<number, N>;
export declare type StringFlag<N extends string> = Flag<string, N>;
export declare type BooleanFlag<N extends string> = Flag<boolean, N>;
export declare type FlagOption<T> = {
    alias?: string;
    default?: T;
    usage?: string;
};
export declare function makeNumberFlag<N extends string>(name: N, option?: FlagOption<number>): NumberFlag<N>;
export declare function makeStringFlag<N extends string>(name: N, option?: FlagOption<string>): StringFlag<N>;
export declare function makeBooleanFlag<N extends string>(name: N, option?: FlagOption<boolean>): BooleanFlag<N>;
export declare type TupleTypes<T> = {
    [P in keyof T]: T[P];
} extends {
    [key: number]: (args: any) => infer V;
} ? V : never;
export declare type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends ((k: infer I) => void) ? I : never;
export declare function mergeFlag<T extends Array<(args: string[]) => {
    [key: string]: any;
}>>(...src: T): (args: string[]) => UnionToIntersection<TupleTypes<T>>;
export declare function reduceFlag<T extends Array<(args: string[]) => {
    [key: string]: any;
}>>(...src: T): (args: string[]) => UnionToIntersection<TupleTypes<T>>;