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Manual Reference Pages  -  PERL::CRITIC::POLICY::MODULES::REQUIRENOMATCHVARSWITHUSEENGLISH (3)

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NAME

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

CONTENTS

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.

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perl v5.20.3 PERL::CRITIC::POLICY::MODULES::REQUIRENOMATCHVARSWITHUSEENGLISH (3) 2016-04-03

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