Re: PHP5: PEAR base Exception classes

Hi Hans! You wrote: > I think it would be great if PEAR provided some re-usable base Exception > classes. I posted this idea a few weeks/moths (dunno) ago... I see a huge benefit in having such a class, since people then can catch any PEARException, if they want to, to just indicate that an exceptional state occured inside a PEAR class. > Would there be an 'exceptions' package? I don't think that this is the way to go. A base exception class should be included in the PERA package. Making a new package and generating new dependencies sounds overhead to me. > I don't see any need > to prefix these w/ a category name, though, since they'd be generic: > > I'm thinking in particular of having a few different extension > categories that PHP5 packages *may* use if desired, e.g.: > > - IOException > - MathException > - ... (I'm sure there are many others) This can be decided from category to category, I think, but in this case, new packages would be needed and new dependencies would raise. Having just a basic exception class and on package basis derived exception classes should be ok. > I don't think that every package needs its own Extensions, but in some > cases a given package will want to be able to selectively throw > different categories for handling by the calling code. Exceptions > become useful when you can use hierarchies & selectively catch. Again, > classes could always throw the base Exception object if desired. Ack. > In addition to the categories, there are some Exception features that > would be very nice, for example: > - NestableException > This is an Exception that allows you to wrap an existing Exception and > re-throw it without losing any info from the original. This would be > particularly useful for PEAR & should be a base class for the other > Exception types IMO. > How does one propose code that goes into core PEAR? I imagine that this > would be in something like an 'exception/' dir, but, again, I don't see > any reason to add a prefix as that would be completely redundant (and > make using them just more cumbersome). I did not really get that point. Can you explain it once more to me? Regards, Toby -- Tobias Schlitt a passion for php http://www.schlitt.info