Allow access to Exception member

[avilv]

There are certain use cases that require access to that member

just as the Unsafe namespace allows access to Value, same should be with Exception

[nlkl]

Hi,

Thank you for your interest in the project.

I understand the concern - currently the ways in which you can access the exceptional value are rather limited, which is something I will certainly look into improving in a future release.

For now, I suggest you simply introduce your own set of extension methods to suit your needs, e.g. something like:

public static class OptionExceptionExtensions
{
    public static TException ExceptionOr<TValue, TException>(this Option<TValue, TException> option, Func<TException> alternativeFactory) =>
        option.Match(_ => alternativeFactory(), exception => exception);

    public static TException ExceptionOr<TValue, TException>(this Option<TValue, TException> option, Func<TValue, TException> alternativeFactory) =>
        option.Match(alternativeFactory, exception => exception);
}

// And use it like:
option.ExceptionOr(() => throw new InvalidOperationException("Unexpected value"));
option.ExceptionOr(value => throw new InvalidOperationException($"Unexpected value: {value}");

I will consider adding similar functionality in a future release, but introducing your own set of additional utility methods is probably the easiest way to get the functionality today.

Hope it helps.

Best regards,
/ Nils