public void EitherToTupleWhenNoneLeft()
{
string expected = string.Empty;
Either <string, int> either = 10;
(Option <string> Left, Option <int> Right)tuple = EitherModule.ToTuple(either);
string result = tuple.Left.Match(value => value, () => string.Empty);
Assert.AreEqual(expected, result);
}
public void EitherToTupleWhenNoneRight()
{
int expected = 0;
Either <string, int> either = "Test";
(Option <string> Left, Option <int> Right)tuple = EitherModule.ToTuple(either);
int result = tuple.Right.Match(value => value, () => 0);
Assert.AreEqual(expected, result);
}
/// <summary>
/// Convert the <see cref="Either{TLeft, TRight}"/> to a <see cref="Tuple{T1,T2}"/> where T1 and T2 are <see cref="Option{T}"/> value of <typeparamref name="TLeft"/> and <typeparamref name="TRight"/> respectively.
/// </summary>
/// <typeparam name="TLeft">The type of the left value.</typeparam>
/// <typeparam name="TRight">The type of the right value.</typeparam>
/// <param name="either">The input either.</param>
/// <returns>
/// Returns a <see cref="Tuple{T1,T2}"/> where T1 and T2 are <see cref="Option{T}"/> value of <typeparamref name="TLeft"/> and <typeparamref name="TRight"/> respectively.
/// The Tuple left value (Item1) is <see cref="Option{T}.Some(T)"/> when <paramref name="either"/> <see cref="Either{TLeft, TRight}.IsLeft"/>, otherwise is <see cref="Option{T}.None"/>
/// The Tuple right value (Item2) is <see cref="Option{T}.Some(T)"/> when <paramref name="either"/> <see cref="Either{TLeft, TRight}.IsRight"/>, otherwise is <see cref="Option{T}.None"/>
/// </returns>
public static (Option <TLeft>, Option <TRight>) ToTuple <TLeft, TRight>(this Either <TLeft, TRight> either)
=> EitherModule.ToTuple(either);