NAME

       Regexp::Optimizer - optimizes regular expressions

VERSION

       $Id: Optimizer.pm,v 0.23 2013/02/26 05:47:41 dankogai Exp dankogai $

SYNOPSIS

         use Regexp::Optimizer;
         my $o  = Regexp::Optimizer->new->optimize(qr/foobar|fooxar|foozap/);
         # $re is now qr/foo(?:[bx]ar|zap)/

EXPORT

       none.

SUBROUTINES/METHODS

   new
       Makes a new optimizer instance.

         my $ro = Regexp::Optimizer->new;

   optimize
       Does the optimization.

         my $re = qr/foobar|fooxar|foozap/;
         $re = $ro->optimize($re);

       If it is already optimized -- no alteration in the regexp, it is practically an identity
       function which simply returns an argument.

       If not, it dissasembles the regexp, feeds it to Regexp::Assemble, and reassembles the
       result.

   as_string
       Same as "optimize()" but returns a string instead of regexp object.

CAVEAT

   ??{CODE} used
       This module depends on the "??{CODE}" regexp construct which is still considered
       experimental as of Perl 5.16.

   not idempotent
       If you feed the regexp that is already optimized, the resulting regexp may not necessarily
       the same -- usually you get duplicate "(?:)":

           my $re = qr/foobar|fooxar|foozap/;
           $re = $ro->optimize($re); # qr/foo(?:[bx]ar|zap)/
           $re = $ro->optimize($re); # qr/foo(?:(?:[bx]ar|zap))/

SEE ALSO

       Regexp::Assemble, perlre

AUTHOR

       Dan Kogai, "<dankogai+cpan at gmail.com>"

BUGS

       Please report any bugs or feature requests to "bug-regexp-optimizer at rt.cpan.org", or
       through the web interface at
       http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Regexp-Optimizer
       <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Regexp-Optimizer>.  I will be notified,
       and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

       You can find documentation for this module with the perldoc command.

           perldoc Regexp::Optimizer

       You can also look for information at:

       •   RT: CPAN's request tracker (report bugs here)

           http://rt.cpan.org/NoAuth/Bugs.html?Dist=Regexp-Optimizer
           <http://rt.cpan.org/NoAuth/Bugs.html?Dist=Regexp-Optimizer>

       •   AnnoCPAN: Annotated CPAN documentation

           http://annocpan.org/dist/Regexp-Optimizer <http://annocpan.org/dist/Regexp-Optimizer>

       •   CPAN Ratings

           http://cpanratings.perl.org/d/Regexp-Optimizer <http://cpanratings.perl.org/d/Regexp-
           Optimizer>

       •   Search CPAN

           http://search.cpan.org/dist/Regexp-Optimizer/ <http://search.cpan.org/dist/Regexp-
           Optimizer/>

ACKNOWLEDGEMENTS

LICENSE AND COPYRIGHT

       Copyright 2013 Dan Kogai.

       This program is free software; you can redistribute it and/or modify it under the terms of
       the the Artistic License (2.0). You may obtain a copy of the full license at:

       <http://www.perlfoundation.org/artistic_license_2_0>

       Any use, modification, and distribution of the Standard or Modified Versions is governed
       by this Artistic License. By using, modifying or distributing the Package, you accept this
       license. Do not use, modify, or distribute the Package, if you do not accept this license.

       If your Modified Version has been derived from a Modified Version made by someone other
       than you, you are nevertheless required to ensure that your Modified Version complies with
       the requirements of this license.

       This license does not grant you the right to use any trademark, service mark, tradename,
       or logo of the Copyright Holder.

       This license includes the non-exclusive, worldwide, free-of-charge patent license to make,
       have made, use, offer to sell, sell, import and otherwise transfer the Package with
       respect to any patent claims licensable by the Copyright Holder that are necessarily
       infringed by the Package. If you institute patent litigation (including a cross-claim or
       counterclaim) against any party alleging that the Package constitutes direct or
       contributory patent infringement, then this Artistic License to you shall terminate on the
       date that such litigation is filed.

       Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS
       "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.  THE IMPLIED WARRANTIES OF
       MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO
       THE EXTENT PERMITTED BY YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT HOLDER OR
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       ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF
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