monarch_dodra:
The rationale for this:
std.ascii: I think returning -1 as a magic number should help
keep the code faster and with less clutter than with exceptions.
For the ASCII version I have two use cases:
- Where I want to go fast&unsafe I just use "c - '0'".
- When I want more safety I'd like to use something as to!(),
that raises exceptions in case of errors.
A function that works on ASCII and returns -1 doesn't give me
much more than "c - '0'". So maybe exceptions are good in the
ASCII case too.
There is also std.typecons.nullable, it's a possibility for
std.uni.numericValue. Generally Phobos should eat more of its dog
food :-)
Bye,
bearophile
