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Perl::Critic::Policy::RegularExpressions::ProhibitUnusualDelimiters - Use only // or {} to delimit regexps.


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


Perl lets you delimit regular expressions with almost any character, but most choices are illegible. Compare these equivalent expressions:

  s/foo/bar/;   # good
  s{foo}{bar};  # good
  s#foo#bar#;   # bad
  s;foo;bar;;   # worse
  s|\|\||\||;   # eye-gouging bad


There is one option for this policy, allow_all_brackets. If this is true, then, in addition to allowing // and {}, the other matched pairs of (), [], and <> are allowed.


Initial development of this policy was supported by a grant from the Perl Foundation.


Chris Dolan <>


Copyright (c) 2007-2023 Chris Dolan

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