Re: parse errors when testing for undefined exceptions

From: Date: Wed, 01 Sep 2004 13:36:49 +0000
Subject: Re: parse errors when testing for undefined exceptions
References: 1 2  Groups: php.internals 
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Okay, I agree with you on this one. Very weird behaviour by the way.. I didn't know about this. "Alan Knowles" <alan@akbkhome.com> schreef in bericht news:4135CD4B.6040508@akbkhome.com... > aghh.. - the previous example was crap > > The priciple it was try to make was that > > .... > require_once 'MyException.php' > throw MyException(....); > .... > > then trying to catch MyException leads to a parse error when it's > try()'d and not loaded. means we cant lazy load any Exceptions, and save > file io/memory etc. > > Regards > Alan > > Alan Knowles wrote: > > > This is a simple example of why making a parse error out of undefined > > Exception types is going to be very problematic. > > > > function test($a) { > > > > if (!extension_exists('sqlite')) { > > return; > > } > > try { > > SQLite::query($a); > > // parse error!!! - if we dont have sqlite, we dont have > > SQLite exception! > > > > } catch(SQLite_Exception $e) { > > > > echo "problem with query"; > > return; > > } > > } > > > > > > This has a big knock on effect that we can not lazy load Exception > > definitions, even if they are only used in Exceptional situations. > > (its pretty much the same issue as instanceof - forcing the loading of > > code, that may never be used, except to test it's non-existance.) > > > > Regards > > Alan > >

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