react-view-router/src/types/utils.ts

react-view-router

import type { RefAttributes } from 'react';

type Contra<T> =
  T extends any
    ? (arg: T) => void
    : never;
type InferContra<T> =
  [T] extends [(arg: infer I) => void]
    ? I
    : never;
type PickOne<T> = InferContra<InferContra<Contra<Contra<T>>>>;
type Union2Tuple<T> =
    PickOne<T> extends infer U
    ? Exclude<T, U> extends never
        ? [T]
        : [...Union2Tuple<Exclude<T, U>>, U]
    : never;

type ForwardRefObject<C> = C extends React.ForwardRefExoticComponent<infer P & RefAttributes<infer T>>
  ? T
  : any;


export {
  PickOne,
  Union2Tuple,
  ForwardRefObject,
};