I want to be able to return a true or false value from a function in a module and populate the $! variable with the specific errors. Is this possible? Is there documentation on how to do this? I can find docs on how to use $! but not how to set it. Thanks for any help -Ken
Did anyone ever reply to this post? I couldn't find it in the archives and I thinnk it's a pretty good question.
There were several responses, I can forward them to you if you really want them. Basically it boiled down to: "Read 'perldoc perlvar' for how and possible values.", and "Are you sure you want to do that?".
For instance would it be 'safe' and 'proper', and 'ok', etc... to do somethign like:
sub whatever { my $foo = shift; undef $!; if($foo eq 'bar') { return 1; } else { $! = "Foo must equal bar";return 0; } }
"Foo must equal bar" is not a valid value for $!, most likely. :-) For what you are doing here I would really prefer you either 'die' or 'warn', depending on what severity you think the problem is. (You could of course 'croak' or 'carp' instead, as applicable.)
Daniel T. Staal
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