Perl::Critic::Policy::RegularExpressions::RequireDotMatchAnything − Always use the "/s" modifier with regular expressions.
This Policy is part of the core Perl::Critic distribution.
When asked what "." in a regular expression means, most people will say that it matches any character, which isn’t true. It’s actually shorthand for "[^\n]". Using the "s" modifier makes "." act like people expect it to.
my $match = m< foo.bar >xm; # not ok my $match = m< foo.bar >xms; # ok
This Policy is not configurable except for the standard options.
Be cautious 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.
Jeffrey Ryan Thalhammer <jeff@imaginative−software.com>
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.