// SelectMany implementation to allow EitherMonad<R> to be used with Linq query compositions
public static EitherMonad <C> SelectMany <A, B, C>(this EitherMonad <A> a, Func <A, EitherMonad <B> > func, Func <A, B, C> select)
{
var b = a.Bind(func);
if (b.IsLeft)
{
return(EitherMonad <C> .Left(b.LeftValue));
}
return(EitherMonad <C> .Return(select(a.RightValue, b.RightValue)));
}
public EitherMonad <R2> Bind <R2>(Func <R, EitherMonad <R2> > func)
{
return(EitherMonad <R2> .Bind(this, func));
}
