NAME

       Perl::Critic::Policy::RegularExpressions::ProhibitSingleCharAlternation - Use "[abc]" instead of "a|b|c".

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       Character classes (like "[abc]") are significantly faster than single character alternations (like
       "(?:a|b|c)").  This policy complains if you have more than one instance of a single character in an
       alternation.  So "(?:a|the)" is allowed, but "(?:a|e|i|o|u)" is not.

       NOTE: Perl 5.10 (not released as of this writing) has major regexp optimizations which may mitigate the
       performance penalty of alternations, which will be rewritten behind the scenes as something like
       character classes.  Consequently, if you are deploying exclusively on 5.10, yo might consider ignoring
       this policy.

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 v5.24.1                        Perl::Critic::Policy::RegularExpressions::ProhibitSingleCharAlternation(3pm)