I've got a Perl/Tk script that let's users type in any old RegEx into a text widget. That RegEx is then used as a file filter. I can't control what they type in. So I need to test their RegEx for validity before it's employed.

That is, I want a sub that returns a 1 when the user's RegEx is valid, 0 otherwise. Like so:

sub re_valid_test {
   my ($re) = @_;
   my %bool = 0;

   ...some way of setting $bool to 1 if $re is valid...

   return $bool;
}

Perl already knows how to fault an invalid RegEx. How do I tap into that?

In reply to Test RegEx Validity by aplonis

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