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Postings from August 2000
Bart Lateur writes: : Apropos those extended mechanisms: couldn't we use the same mechanism as : is currently in use for $!, for $@ too? I mean: $! in numerical context : gives an error number, in string context a text string. Then : : die "I'm outta here: $!"; : : should assign both the numeric representation of $! and the new text : representation, the custom text, to the current $@ (future $!). Whatever you do with the string or numeric part, I think the new $! should push the old $! onto its stack of the old exception objects. : That numerical part could then form the basis of the extended exception : mechanism. No, the programmer shouldn't memorize the error numbers: : there should be predefined constants, like : : ERROR::filenotfound : : which are numeric, and which could then be used for the catch switch. : Well, maybe drop the "ERROR::" part for brevity -- but not for clarity. I think I agree with the folks that say errors should be caught by type, not by number. Just as a for instance, you ought to able to write a simple handler that catches any ERRNO-style error. LarryThread Previous | Thread Next