english(3pm) [suse man page]

English(3pm)						 Perl Programmers Reference Guide					      English(3pm)

NAME

       English - use nice English (or awk) names for ugly punctuation variables

SYNOPSIS

	   use English qw( -no_match_vars ) ;  # Avoids regex performance penalty
	   use English;
	   ...
	   if ($ERRNO =~ /denied/) { ... }

DESCRIPTION

       This module provides aliases for the built-in variables whose names no one seems to like to read.  Variables with side-effects which get
       triggered just by accessing them (like $0) will still be affected.

       For those variables that have an awk version, both long and short English alternatives are provided.  For example, the $/ variable can be
       referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module.

       See perlvar for a complete list of these.

PERFORMANCE

       This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details.  If performance matters
       in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing

	  use English qw( -no_match_vars ) ;

       .  It is especially important to do this in modules to avoid penalizing all applications which use them.

perl v5.12.1							    2010-04-26							      English(3pm)

Perl::Critic::Policy::Modules::RequireNoMatchVarsWithUseUseriContributed Perl DoPerl::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							    2014-06-09	Perl::Critic::Policy::Modules::RequireNoMatchVarsWithUseEnglish(3)