import { Arr } from './useful';
export declare type TupleSize<T extends Arr> = T extends {
    length: infer N;
} ? N : never;
export declare type TupleFirst<T extends Arr> = T extends readonly [infer F, ...any] ? F : never;
export declare type TupleValues<T extends Arr> = T extends readonly [infer F, ...infer R] ? F | TupleValues<R> : never;