Lexical Warnings, pre-5.6 style

I'm developing a module that allows for "scoped" warnings to be turned on
and off and handled differently, and given different priorities (in the
case that two warnings match the same regex -- explained in the module),
for those versions of Perl before 5.6.

  http://www.pobox.com/~japhy/tmp/perl/Warnings.pm

I'd appreciate some feedback.

-- 

  MIDN 4/C PINYAN, USNR, NROTCURPI     http://www.pobox.com/~japhy/
  jeff pinyan: japhy@pobox.com     perl stuff: japhy+perl@pobox.com
  "The Art of Perl"               http://www.pobox.com/~japhy/book/      
  CPAN ID: PINYAN  http://www.perl.com/CPAN/authors/id/P/PI/PINYAN/
  PerlMonth - An Online Perl Magazine     http://www.perlmonth.com/

• Lexical Warnings, pre-5.6 style by Jeff Pinyan
• Re: Lexical Warnings, pre-5.6 style by Jeff Pinyan