Perl::Critic::Policy::Variables::ProhibitMatchVars(3)
NAME
Perl::Critic::Policy::Variables::ProhibitMatchVars - Avoid "$`", "$&",
"$'" and their English equivalents.
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
Using the "match variables" "$`", $&, and/or "$'" can significantly
degrade the performance of a program. This policy forbids using them
or their English equivalents. See perldoc English or PBP page 82 for
more information.
It used to forbid plain "use English;" because it ends up causing the
performance side-effects of the match variables. However, the message
emitted for that situation was not at all clear and there is now
Perl::Critic::Policy::Modules::RequireNoMatchVarsWithUseEnglish, which
addresses this situation directly.
CONFIGURATION
This Policy is not configurable except for the standard options.
AUTHOR
Chris Dolan <cdolan@cpan.org>
COPYRIGHT
Copyright (c) 2006-2011 Chris Dolan.
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 v5.28.2 Perl::Critic::Policy::Variables::ProhibitMatchVars(3)
perl-critic 1.134.0 - Generated Thu Jun 6 11:22:15 CDT 2019