NAME

       PAR::Filter - Input filter for PAR

SYNOPSIS

           $code = 'use strict; print "Hello, World!\n";';
           $ref = PAR::Filter->new('PodStrip', 'Bleach')->apply(\$code);
           print $code;    # pod-stripped and obfuscated code
           print $$ref;    # same thing

           $ref = PAR::Filter->new('PodStrip', 'Bleach')->apply('file.pl');
           print $$ref;    # same thing, applied to file.pl

DESCRIPTION

       Starting with PAR 0.76, "pp -f" takes a filter name, like "Bleach", and invokes this
       module to transform the programs with PAR::Filter::Bleach.  Similarly, "pp -F Bleach"
       applies the Bleach filter to all included modules.

       It is possible to pass in multiple such filters, which are applied in turn.

       The output of each such filter is expected be semantically equivalent to the input,
       although possibly obfuscated.

       The default list of filters include:

       •   PAR::Filter::Bleach

           The archetypical obfuscating filter.

       •   PAR::Filter::Obfuscate

           Use B::Deobfuscate to strip away indents and comments, as well as mangling variable
           names.

       •   PAR::Filter::PatchContent

           Fix PAR-incompatible modules, applied to modules by default.

       •   PAR::Filter::PodStrip

           Strip away POD sections, applied to modules by default.

       •   PAR::Filter::Bytecode

           Use B::Bytecode to strip away indents and comments.  This filter is deprecated! For
           source hiding, have a look at PAR::Filter::Crypto instead and make sure to read about
           its caveats.

AUTHORS

       Audrey Tang <cpan@audreyt.org>

COPYRIGHT

       Copyright 2003-2009 by Audrey Tang <cpan@audreyt.org>.

       This program is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.

       See LICENSE.