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Thanks for both of these replies, especially the second since I wasn't aware of the DEBUG_REGEX environment variable.

I should have been a bit clearer, but it appears that what I want to do probably can't be done. For example, say I have the absurdly simple script:

$re1 = qr/a/; $re2 = qr/b/; $re3 = qr/c/; $str = "ab"; $str =~ $re1; $str =~ $re2; $str =~ $re3;

what I want to do is step through the code (in the debugger) and turn on debugging (by executing "use re 'debug'") when I match against $re2 but then turn it back off before proceeding to the $re3 match.

I could put each in it's own scope, but that would be messy (I don't really want to put every regexp in it's own scope so that I could potentially debug it individually).

Even worse is that the regexps in question were built outside of the scope, so I actually end up with something more similar to this:

$str = "abc"; $re1 = qr/a/; $re2 = qr/b/; { use re 'debug'; $str =~ $re1; { no re 'debug'; $str =~ $re2; } }

which won't print any debugging info at all.

Oh well, I can do what I've always done (temporarily enable debugging and then go to the point in the code I'm interested in ignoring all the unwanted debugging output).

In reply to Re^3: Turning on regexp debugging at runtime by SBECK
in thread Turning on regexp debugging at runtime by SBECK

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