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.IX Title "Perl::Critic::Policy::RegularExpressions::ProhibitEnumeratedClasses 3pm"
.TH Perl::Critic::Policy::RegularExpressions::ProhibitEnumeratedClasses 3pm 2023-07-26 "perl v5.38.0" "User Contributed Perl Documentation"
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.SH NAME
Perl::Critic::Policy::RegularExpressions::ProhibitEnumeratedClasses \- Use named character classes instead of explicit character lists.
.SH AFFILIATION
.IX Header "AFFILIATION"
This Policy is part of the core Perl::Critic
distribution.
.SH DESCRIPTION
.IX Header "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.
.PP
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 \f(CW\*(C`m/[A\-Z]/\*(C'\fR can be a source of bugs when you really meant
\&\f(CW\*(C`m/\ep{IsUpper}/\*(C'\fR.  This policy catches a selection of possible
incorrect character class usage.
.PP
Specifically, the patterns are:
.PP
\&\fR\f(CB\*(C`[\et\er\en\ef\e ]\*(C'\fR\fB\fR vs. \fB\fR\f(CB\*(C`\es\*(C'\fR\fB\fR
.PP
\&\fR\f(CB\*(C`[\et\er\en\e ]\*(C'\fR\fB\fR vs. \fB\fR\f(CB\*(C`\es\*(C'\fR\fB\fR   (because many people forget \f(CW\*(C`\ef\*(C'\fR)
.PP
\&\fR\f(CB\*(C`[A\-Za\-z0\-9_]\*(C'\fR\fB\fR vs. \fB\fR\f(CB\*(C`\ew\*(C'\fR\fB\fR
.PP
\&\fR\f(CB\*(C`[A\-Za\-z]\*(C'\fR\fB\fR vs. \fB\fR\f(CB\*(C`\ep{IsAlphabetic}\*(C'\fR\fB\fR
.PP
\&\fR\f(CB\*(C`[A\-Z]\*(C'\fR\fB\fR vs. \fB\fR\f(CB\*(C`\ep{IsUpper}\*(C'\fR\fB\fR
.PP
\&\fR\f(CB\*(C`[a\-z]\*(C'\fR\fB\fR vs. \fB\fR\f(CB\*(C`\ep{IsLower}\*(C'\fR\fB\fR
.PP
\&\fR\f(CB\*(C`[0\-9]\*(C'\fR\fB\fR vs. \fB\fR\f(CB\*(C`\ed\*(C'\fR\fB\fR
.PP
\&\fR\f(CB\*(C`[^\ew]\*(C'\fR\fB\fR vs. \fB\fR\f(CB\*(C`\eW\*(C'\fR\fB\fR
.PP
\&\fR\f(CB\*(C`[^\es]\*(C'\fR\fB\fR vs. \fB\fR\f(CB\*(C`\eS\*(C'\fR\fB\fR
.SH CONFIGURATION
.IX Header "CONFIGURATION"
This Policy is not configurable except for the standard options.
.SH CREDITS
.IX Header "CREDITS"
Initial development of this policy was supported by a grant from the
Perl Foundation.
.SH AUTHOR
.IX Header "AUTHOR"
Chris Dolan <cdolan@cpan.org>
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright (c) 2007\-2021 Chris Dolan.  Many rights reserved.
.PP
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