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Re: Exception Classes Advice on Subclasses

by venk (Acolyte)
on Dec 21, 2005 at 13:39 UTC ( #518302=note: print w/replies, xml ) Need Help??


in reply to Exception Classes Advice on Subclasses

I suggest using subclasses rather than trying to differentiate your exceptions through 'fields'.
if ( my $e = X::Class::SubClass1->caught ) { # handle } elsif ( my $e = X::Class::SubClass2->caught ) { # handle }
In each block, the above code directly describes the type of error that it handles --- I think using 'fields' requires the reader to work a little harder to understand what is going on. That said, I recommend not getting carried away with defining complex exception hierarchies. Start with a simple X::Class->caught and subclass only as required by your application.

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[Eily]: It can also be used to force a copy, and remove magic from a variable
[Eily]: there was a post some time ago about variable coming from regex taking more space than the same string defined directly IIRC
[Eily]: and if there's XS, make sure the scalar holds a string representation, that sounds like bad practice though (forcing that on the call side)

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