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From Stas Bekman <s...@stason.org>
Subject Re: APR::Error constant matching
Date Thu, 10 Jun 2004 08:48:50 GMT
[adjusting the subject]

Joe Schaefer wrote:
> Stas Bekman <stas@stason.org> writes:
> 
> [...]
> 
> 
>>>>I'm also going to add a wrapper to replace the crafty
>>>>
>>>> if (ref $@ eq 'Apache::Error' && $@ == APR::TIMEUP) { ... }
>>>>
>>>>with:
>>>>
>>>> if (APR::Error::foo($@, APR::TIMEUP)) { ... }
> 
> 
> OTOH, why not just write
> 
>   if ($@ == APR::TIMEUP) { ... }
> 
> ? If you're worried about numerification warnings
> (assuming $@ isn't a number or an APR::Error object), 
> making APR::TIMEUP an APR::Error object would cause 
> perl to call the overloaded "==".

That's an idea I haven't thought of. Though it's going to be hard to figure 
out which APR::Const and Apache::Const are to be made APR::Error objects, 
since on the C level in apr/apache there is no distinction between these 
groups. Moreover even we do find a way to create a subset of those, currently 
it'll be really hard to tell whether a certain constant is an APR::Error 
object and which a real numerical constant. I suppose we will need to 
introduce a whole new concept and separate error constants (like APR::TIMEUP) 
from other constants (like APR::SO_NONBLOCK). May be those error constants 
then should move into a different class? That's a pretty big change.


-- 
__________________________________________________________________
Stas Bekman            JAm_pH ------> Just Another mod_perl Hacker
http://stason.org/     mod_perl Guide ---> http://perl.apache.org
mailto:stas@stason.org http://use.perl.org http://apacheweek.com
http://modperlbook.org http://apache.org   http://ticketmaster.com

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