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Manual Reference Pages  -  PERL::CRITIC::POLICY::REGULAREXPRESSIONS::REQUIREBRACESFORMULTILINE (3)

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NAME

Perl::Critic::Policy::RegularExpressions::RequireBracesForMultiline - Use "{" and "}" to delimit multi-line regexps.

CONTENTS

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

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perl v5.20.3 PERL::CRITIC::POLICY::REGULAREXPRESSIONS::REQUIREBRACESFORMULTILINE (3) 2016-04-03

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