export type IngestFn<T> = (input: string | undefined) => T;
export type CoerceFn<T> = (input: string) => T;
export type ValidateFn<T> = (input: T) => T;
export type Unit<T> = {
    ingest: IngestFn<T>;
    help?: string;
} & UnitReflection;
export type UnitReflection = {
    mode: string;
    type: string;
    fallback?: string;
};
export type Arg<N extends string = string, T = any> = {
    name: N;
} & Unit<T>;
export type Param<T = any> = {
    flag?: string;
} & Unit<T>;
export type Args = Arg[];
export type Params = Record<string, Param>;
export type DistillInput<I extends Unit<any>> = I extends Unit<infer T> ? T : never;
export type Opts<T> = {
    help?: string;
    validate?: ValidateFn<T>;
};
export type ModeFn<T, Z extends any[]> = (type: Type<T>, ...z: Z) => Unit<T>;
export type Type<T> = {
    name: string;
    coerce: CoerceFn<T>;
};