Ovid wrote: > Also, for purposes of backwards compatability, I'm concerned about qr// and > $code->(). > When were those first introduced in Perl? I don't want someone using really > old versions to not be able to use this code.
qr// was introduced in 5.6. $code->() has been in there as long as I know. "use warnings" is 5.6. To give you an idea, the Test-Simple distribution has been broken on 5.5.3 for a few releases now (Test::Builder::Tester uses qr//) and I've gotten a grand total of one bug report about it.
