CentOS 7.0 - man page for perl::critic::policy::modules::requirenomatchvarswithuseenglish (centos section 3)

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Perl::Critic::Policy::Modules::Perl::Critic::Policy::Modules::RequireNoMatchVarsWithUseEnglish(3)

NAME
       Perl::Critic::Policy::Modules::RequireNoMatchVarsWithUseEnglish - "use English" must be
       passed a "-no_match_vars" argument.

AFFILIATION
       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION
       Due to unfortunate history, if you use the English module but don't pass in a
       "-no_match_vars" argument, all regular expressions in the entire program, not merely the
       module in question, suffer a significant performance penalty, even if you only import a
       subset of the variables.

	   use English; 			     # not ok
	   use English '-no_match_vars';	     # ok
	   use English qw< $ERRNO -no_match_vars >;  # ok
	   use English qw($OS_ERROR);		     # not ok

       In the last example above, while the match variables aren't loaded into your namespace,
       they are still created in the "English" namespace and you still pay the cost.

CONFIGURATION
       This Policy is not configurable except for the standard options.

AUTHOR
       Elliot Shank "<perl@galumph.com>"

COPYRIGHT
       Copyright (c) 2008-2011 Elliot Shank.

       This program is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.  The full text of this license can be found in the LICENSE file
       included with this module.

perl v5.16.3		       Perl::Critic::Policy::Modules::RequireNoMatchVarsWithUseEnglish(3)


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