Perl::Critic::Policy::RegularExpressions::RequireLineBoundaryMatching - Always use the "/m" modifier with

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

       Jeffrey Ryan Thalhammer  <jeff@imaginative-software.com>

       This Policy is not configurable except for the standard options.

       Copyright (c) 2005-2011 Imaginative Software Systems. All 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 v5.40.0                                       2024-10-28              Perl::Critic::...oundaryMatching(3pm)

       Folks coming from a "sed" or "awk" background tend to assume that '$' and '^' match the beginning and end
       of the line, rather than then beginning and end of the string.  Adding the '/m' flag to your regex makes
       it behave as most people expect it should.

           my $match = m{ ^ $pattern $ }x;  #not ok
           my $match = m{ ^ $pattern $ }xm; #ok

       Perl::Critic::Policy::RegularExpressions::RequireLineBoundaryMatching - Always use the "/m" modifier with
       regular expressions.

       For common regular expressions like e-mail addresses, phone numbers, dates, etc., have a look at the
       Regexp::Common module.  Also, be cautions about slapping modifier flags onto existing regular
       expressions, as they can drastically alter their meaning.  See <http://www.perlmonks.org/?node_id=484238>
       for an interesting discussion on the effects of blindly modifying regular expression flags.