perl::critic::policy::regularexpressions::requirebracesformultil(3pm) [debian man page]
Perl::Critic::Policy::RegularExpressions::RequireBracesFUserlContributed PPerl::Critic::Policy::RegularExpressions::RequireBracesForMultiline(3pm) NAME
Perl::Critic::Policy::RegularExpressions::RequireBracesForMultiline - Use "{" and "}" to delimit multi-line regexps. AFFILIATION
This Policy is part of the core Perl::Critic distribution. DESCRIPTION
Long regular expressions are hard to read. A good practice is to use the "x" modifier and break the regex into multiple lines with comments explaining the parts. But, with the usual "//" delimiters, the beginning and end can be hard to match, especially in a "s///" regexp. Instead, try using "{}" characters to delimit your expressions. Compare these: s/ <a s+ href="([^"]+)"> (.*?) </a> /link=$1, text=$2/xms; vs. s{ <a s+ href="([^"]+)"> (.*?) </a> } {link=$1, text=$2}xms; Is that an improvement? Marginally, but yes. The curly braces lead the eye better. CONFIGURATION
There is one option for this policy, "allow_all_brackets". If this is true, then, in addition to allowing "{}", the other matched pairs of "()", "[]", and "<>" are allowed. 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 v5.14.2 2012-0Perl::Critic::Policy::RegularExpressions::RequireBracesForMultiline(3pm)
Check Out this Related Man Page
Perl::Critic::Policy::RegularExpressions::ProhibitSingleUserAContributPerl::Critic::Policy::RegularExpressions::ProhibitSingleCharAlternation(3pm) 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 v5.14.2 20Perl::Critic::Policy::RegularExpressions::ProhibitSingleCharAlternation(3pm)