Perl::Critic::Policy::Modules::RequireEndWithOne - End each module with an explicitly C<1;> instead of some funky expression.

Perl-Critic documentation Contained in the Perl-Critic distribution.

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NAME

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Perl::Critic::Policy::Modules::RequireEndWithOne - End each module with an explicitly 1; instead of some funky expression.

AFFILIATION

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

DESCRIPTION

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All files included via use or require must end with a true value to indicate to the caller that the include was successful. The standard practice is to conclude your .pm files with 1;, but some authors like to get clever and return some other true value like return "Club sandwich";. We cannot tolerate such frivolity! OK, we can, but we don't recommend it since it confuses the newcomers.

CONFIGURATION

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This Policy is not configurable except for the standard options.

AUTHOR

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Chris Dolan cdolan@cpan.org

Some portions cribbed from Perl::Critic::Policy::Modules::RequireExplicitPackage.

COPYRIGHT

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Copyright (c) 2005-2011 Chris Dolan and 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-Critic documentation Contained in the Perl-Critic distribution. 
##############################################################################
#      $URL: http://perlcritic.tigris.org/svn/perlcritic/trunk/distributions/Perl-Critic/lib/Perl/Critic/Policy/Modules/RequireEndWithOne.pm $
#     $Date: 2011-05-15 16:34:46 -0500 (Sun, 15 May 2011) $
#   $Author: clonezone $
# $Revision: 4078 $
##############################################################################

package Perl::Critic::Policy::Modules::RequireEndWithOne;

use 5.006001;
use strict;
use warnings;
use Readonly;

use Perl::Critic::Utils qw{ :severities :classification };
use base 'Perl::Critic::Policy';

our $VERSION = '1.116';

#-----------------------------------------------------------------------------

Readonly::Scalar my $EXPL => q{Must end with a recognizable true value};
Readonly::Scalar my $DESC => q{Module does not end with "1;"};

#-----------------------------------------------------------------------------

sub supported_parameters { return ()                  }
sub default_severity     { return $SEVERITY_HIGH      }
sub default_themes       { return qw( core bugs pbp ) }
sub applies_to           { return 'PPI::Document'     }

#-----------------------------------------------------------------------------

sub prepare_to_scan_document {
    my ( $self, $document ) = @_;

    return $document->is_module();   # Must be a library or module.
}

sub violates {
    my ( $self, $elem, $doc ) = @_;

    # Last statement should be just "1;"
    my @significant = grep { _is_code($_) } $doc->schildren();
    my $match = $significant[-1];
    return if !$match;
    return if ((ref $match) eq 'PPI::Statement' &&
               $match =~  m{\A 1 \s* ; \z}xms );

    # Must be a violation...
    return $self->violation( $DESC, $EXPL, $match );
}

sub _is_code {
    my $elem = shift;
    return ! (    $elem->isa('PPI::Statement::End')
               || $elem->isa('PPI::Statement::Data'));
}

1;

__END__

#-----------------------------------------------------------------------------


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