Perl::Critic::Policy::RegularExpressions::RequireLineBoundaryMatching(3pm)
                                           User Contributed Perl Documentation


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

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

DESCRIPTION
       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

CONFIGURATION
       This Policy is not configurable except for the standard options.

NOTES
       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.

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

COPYRIGHT
       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 v5.38.0                      2023-07-26
    Perl::Critic::Policy::RegularExpressions::RequireLineBoundaryMatching(3pm)