On Thursday, 6 February 2014 at 22:19:42 UTC, Dicebot wrote:
On Thursday, 6 February 2014 at 22:15:11 UTC, Brad Anderson
wrote:
Personally I don't think bad user input qualifies as an
exceptional case because it's expected to happen and the
program is expected to handle it (and let the user know) when
it does. That's just a matter of taste though.
I agree. It kills the whole concept of "exceptions are rare so
they don't need to be fast when thrown". But it is how quite
lot of Phobos is currently designed and, in my opinion, is
biggest design mistake of vibe.d too (it uses exceptions to
propagate HTTP status codes)
I must admit that I am guilty of sometimes using exceptions for
routine control flow too. It's just so convenient compared to
validation/consumption.
Maybe we should make a list of Phobos functions that throw
exceptions and ensure that (for the ones where this makes sense)
they non-throwing validators available. If we can stop gc
allocating them that'd be even better but I don't think them
being gc allocating should hold up @nogc.
