namespace SJK.Functional;

public interface IEither<TLeft, TRight>
{
  IEither<TNewLeft, TRight> MapLeft<TNewLeft>(Func<TLeft, TNewLeft> mapping);
  IEither<TLeft, TNewRight> MapRight<TNewRight>(Func<TRight, TNewRight> mapping);
  TLeft Reduce(Func<TRight, TLeft> mapping);
  (TLeft?, TRight?) Deconstruct();
  TResult Match<TResult>(Func<TLeft, TResult> left, Func<TRight, TResult> right);
  void Match(Action<TLeft> left, Action<TRight> right);
  IEither<TLeft, T2> Bind<T2>(Func<TRight, IEither<TLeft, T2>> value);
  bool IsRight();
  bool IsLeft() => !IsRight();
}