export type EnumWithAssociatedValues<Params> = {
  [Key in keyof Params]: (values: Params[Key]) => Params[Key];
};

export function associatedValue<T>() { return (null as unknown) as T; }

export function enumWithAssociatedValues<P>(params: P): EnumWithAssociatedValues<P> {
  const result: any = { };
  Object.keys(params).forEach((key: string) => {
    const Clazz = class { };
    result[key] = (args: any) => {
      const instance: any = new Clazz();
      Object.assign(instance, args);
      instance.key = key;
      return instance;
    };
  });

  return result as EnumWithAssociatedValues<P>;
}