private static void PlayAroundEitherMonad()
{
var exec1 = from x in 0.ToExceptional()
from y in Exceptional.Execute(() => 6 / x)
from z in 7.ToExceptional()
select x + y + z;
Console.WriteLine("Exceptional Result 1: " + exec1);
var exec2 = Exceptional.From(0)
.ThenExecute(x => x + 6 / x)
.ThenExecute(y => y + 7);
Console.WriteLine("Exceptional Result 2: " + exec2);
var exec3 = Exceptional.From(3)
.ThenExecute(x => x + 6 / x)
.ThenExecute(y => y + 7);
Console.WriteLine("Exceptional Result 3: " + exec3);
}
public static Exceptional <U> ThenExecute <T, U>(this Exceptional <T> value, Func <T, U> getValue)
{
return(value.SelectMany(x => Exceptional.Execute(() => getValue(x))));
}
public static Exceptional <V> SelectMany <T, U, V>(this Exceptional <T> value, Func <T, Exceptional <U> > k, Func <T, U, V> m)
{
return(value.SelectMany(t => k(t).SelectMany(u => m(t, u).ToExceptional())));
}
public static Exceptional <U> SelectMany <T, U>(this Exceptional <T> value, Func <T, Exceptional <U> > k)
{
return((value.HasException)
? new Exceptional <U>(value.Exception)
: k(value.Value));
}