Regexp::Optimizer (3pm)

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

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

none.

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 \*(C`optimize()\*(C' but returns a string instead of regexp object.

??{\s-1CODE\s0} used

This module depends on the \*(C`??{CODE}\*(C' 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 \*(C`(?:)\*(C':

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

Regexp::Assemble, perlre

Dan Kogai, \*(C`<dankogai+cpan at gmail.com>\*(C'

Please report any bugs or feature requests to \*(C`bug-regexp-optimizer at rt.cpan.org\*(C', 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.

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

perldoc Regexp::Optimizer

You can also look for information at:

• \s-1RT:\s0 \s-1CPAN\s0'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 \s-1CPAN\s0 documentation http://annocpan.org/dist/Regexp-Optimizer <http://annocpan.org/dist/Regexp-Optimizer>

• \s-1CPAN\s0 Ratings http://cpanratings.perl.org/d/Regexp-Optimizer <http://cpanratings.perl.org/d/Regexp-Optimizer>

• Search \s-1CPAN\s0 http://search.cpan.org/dist/Regexp-Optimizer/ <http://search.cpan.org/dist/Regexp-Optimizer/>

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>

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