++ed by:
ADAMJS ARJONES ARPI AYOUNG AZAWAWI

38 PAUSE user(s)
22 non-PAUSE user(s).

Jeffrey Ryan Thalhammer

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.




Hosting generously
sponsored by Bytemark