--- /dev/null
+##############################################################################
+# $URL: http://perlcritic.tigris.org/svn/perlcritic/trunk/Perl-Critic/lib/Perl/Critic/Policy/RegularExpressions/RequireLineBoundaryMatching.pm $
+# $Date: 2008-07-03 10:19:10 -0500 (Thu, 03 Jul 2008) $
+# $Author: clonezone $
+# $Revision: 2489 $
+##############################################################################
+
+package Perl::Critic::Policy::RegularExpressions::RequireLineBoundaryMatching;
+
+use 5.006001;
+use strict;
+use warnings;
+use Readonly;
+
+use Perl::Critic::Utils qw{ :severities };
+use Perl::Critic::Utils::PPIRegexp qw{ &get_modifiers };
+use base 'Perl::Critic::Policy';
+
+our $VERSION = '1.088';
+
+#-----------------------------------------------------------------------------
+
+Readonly::Scalar my $DESC => q{Regular expression without "/m" flag};
+Readonly::Scalar my $EXPL => [ 237 ];
+
+#-----------------------------------------------------------------------------
+
+sub supported_parameters { return () }
+sub default_severity { return $SEVERITY_LOW }
+sub default_themes { return qw(core pbp cosmetic) }
+sub applies_to { return qw(PPI::Token::Regexp::Match
+ PPI::Token::Regexp::Substitute
+ PPI::Token::QuoteLike::Regexp) }
+
+#-----------------------------------------------------------------------------
+
+sub violates {
+ my ( $self, $elem, undef ) = @_;
+
+ my %mods = get_modifiers($elem);
+ if ( ! $mods{m} ) {
+ return $self->violation( $DESC, $EXPL, $elem );
+ }
+ return; #ok!;
+}
+
+1;
+
+__END__
+
+#-----------------------------------------------------------------------------
+
+=pod
+
+=head1 NAME
+
+Perl::Critic::Policy::RegularExpressions::RequireLineBoundaryMatching - Always use the C</m> modifier with regular expressions.
+
+=head1 AFFILIATION
+
+This Policy is part of the core L<Perl::Critic> distribution.
+
+
+=head1 DESCRIPTION
+
+Folks coming from a C<sed> or C<awk> background tend to assume that
+C<'$'> and C<'^'> match the beginning and and of the line, rather than
+then beginning and ed 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
+
+
+=head1 CONFIGURATION
+
+This Policy is not configurable except for the standard options.
+
+
+=head1 NOTES
+
+For common regular expressions like e-mail addresses, phone numbers,
+dates, etc., have a look at the L<Regex::Common> module. Also, be
+cautions about slapping modifier flags onto existing regular
+expressions, as they can drastically alter their meaning. See
+L<http://www.perlmonks.org/?node_id=484238> for an interesting
+discussion on the effects of blindly modifying regular expression
+flags.
+
+=head1 AUTHOR
+
+Jeffrey Ryan Thalhammer <thaljef@cpan.org>
+
+=head1 COPYRIGHT
+
+Copyright (c) 2005-2008 Jeffrey Ryan Thalhammer. 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.
+
+=cut
+
+# Local Variables:
+# mode: cperl
+# cperl-indent-level: 4
+# fill-column: 78
+# indent-tabs-mode: nil
+# c-indentation-style: bsd
+# End:
+# ex: set ts=8 sts=4 sw=4 tw=78 ft=perl expandtab shiftround :