| Perl::Critic::Policy::RegularExpressions::RequireBracesForMultiline(3pm) | User Contributed Perl Documentation | Perl::Critic::Policy::RegularExpressions::RequireBracesForMultiline(3pm) |
Perl::Critic::Policy::RegularExpressions::RequireBracesForMultiline - Use "{" and "}" to delimit multi-line regexps.
This Policy is part of the core Perl::Critic distribution.
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.
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.
Initial development of this policy was supported by a grant from the Perl Foundation.
Chris Dolan <cdolan@cpan.org>
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
| 2023-01-15 | perl v5.36.0 |