Does string.isNumeric mean that parse!int will not throw?

[w0rp]

On Thursday, 20 February 2014 at 19:58:10 UTC, Stanislav Blinov
wrote:
> On Thursday, 20 February 2014 at 19:46:35 UTC, w0rp wrote:
>
>> if (s.length > 0 && s.all!isDigit) {
>>     // Never throws now.
>>     auto x = parse!int(s);
>> }
>
> And what about +/- and U/L suffixes? Or, say, different base 
> (i.e. hexadecimal)?
>
> It would be way more beneficial if Phobos' parse (or some 
> additional function) returned some kind of Optional. Maybe a D 
> implementation of Andrei's Expected<T>?

True, this doesn't cover those. Returning a
Maybe/Option/Nullable/Whatever type from another function may be
better.