Perl::Critic::Policy::RegularExpressions::ProhibitEnumeratedClasses(3)
NAME
Perl::Critic::Policy::RegularExpressions::ProhibitEnumeratedClasses -
Use named character classes instead of explicit character lists.
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
This policy is not for everyone! If you are working in pure ASCII,
then disable it now or you may see some false violations.
On the other hand many of us are working in a multilingual world with
an extended character set, probably Unicode. In that world, patterns
like "m/[A-Z]/" can be a source of bugs when you really meant
"m/\p{IsUpper}/". This policy catches a selection of possible
incorrect character class usage.
Specifically, the patterns are:
"[\t\r\n\f\ ]" vs. "\s"
"[\t\r\n\ ]" vs. "\s" (because many people forget "\f")
"[A-Za-z0-9_]" vs. "\w"
"[A-Za-z]" vs. "\p{IsAlphabetic}"
"[A-Z]" vs. "\p{IsUpper}"
"[a-z]" vs. "\p{IsLower}"
"[0-9]" vs. "\d"
"[^\w]" vs. "\W"
"[^\s]" vs. "\S"
CONFIGURATION
This Policy is not configurable except for the standard options.
CREDITS
Initial development of this policy was supported by a grant from the
Perl Foundation.
AUTHOR
Chris Dolan <cdolan@cpan.org>
COPYRIGHT
Copyright (c) 2007-2011 Chris Dolan. Many rights reserved.
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.Perl::Critic::Policy::RegularExpressions::ProhibitEnumeratedClasses(3)
perl-critic 1.134.0 - Generated Tue Jun 4 14:12:42 CDT 2019