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THALJEF / Perl-Critic-More-1.003 / lib / Perl / Critic / Policy / Modules / RequirePerlVersion.pm 

            

              
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#######################################################################
#      $URL: http://perlcritic.tigris.org/svn/perlcritic/trunk/distributions/Perl-Critic-More/lib/Perl/Critic/Policy/Modules/RequirePerlVersion.pm $
#     $Date: 2013-10-29 09:39:11 -0700 (Tue, 29 Oct 2013) $
#   $Author: thaljef $
# $Revision: 4222 $
########################################################################
package Perl::Critic::Policy::Modules::RequirePerlVersion;
use 5.006001;
use strict;
use warnings;
use Readonly;
use Perl::Critic::Utils qw{ :severities };
use base 'Perl::Critic::Policy';
our $VERSION = '1.003';
#---------------------------------------------------------------------------
Readonly::Scalar my $DESC => 'Missing Perl version';
Readonly::Scalar my $EXPL => 'Add "use 5.006" or similar';
#---------------------------------------------------------------------------
sub default_severity     { return $SEVERITY_LOWEST }
sub default_themes       { return qw< more compatibility > }
sub applies_to           { return 'PPI::Document' }
sub supported_parameters { return () }
#---------------------------------------------------------------------------
sub violates {
    my ( $self, $elem, $doc ) = @_;
    my $includes = $doc->find('PPI::Statement::Include');
    if ($includes) {
        for my $stmt ( @{$includes} ) {
            next   if $stmt->type ne 'use';
            return if $stmt->version;
            return if $stmt->module =~ m<
                \A
                v
                \d+
                (?:
                    [.] \d+
                    (?:
                        _ \d+
                    )?
                )*
                \z
            >xms;
        }
    }
    return $self->violation( $DESC, $EXPL, $doc );
}
1;
__END__
#---------------------------------------------------------------------------
=pod
=for stopwords
=head1 NAME
Perl::Critic::Policy::Modules::RequirePerlVersion - Require a C<use 5.006;> or similar.
=head1 AFFILIATION
This policy is part of L<Perl::Critic::More|Perl::Critic::More>, a bleeding
edge supplement to L<Perl::Critic|Perl::Critic>.
=head1 DESCRIPTION
As Perl evolves, new desirable features get added.  The best ones seem to
break backward compatibility, unfortunately.  As a favor to downstream
developers, it's good to state explicitly which Perl version will not be able
to parse your code.
For example, the C<our> keyword was first appeared in a stable Perl in version
5.6.0.  Therefore, if your code employs C<our>, then you should have a line
like this near the very top of your file:
    use 5.006;
or
  use v5.6.0;
The former is preferred as the latter can trigger v-string compatibility
warnings.  (If someone could please explain that to me, I'd really appreciate
it!)
Additionally, it's good form to state that minimum version in your
F<Makefile.PL> or F<Build.PL> file.
=head1 AUTHOR
Chris Dolan <cdolan@cpan.org>
=head1 COPYRIGHT
Copyright (c) 2006-2008 Chris Dolan
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 :