The Perl and Raku Conference 2025: Greenville, South Carolina - June 27-29 Learn more

ELLIOTJS / Perl-Critic-1.107_001 / lib / Perl / Critic / Policy / ClassHierarchies / ProhibitExplicitISA.pm 

            

              
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
—
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101

              
##############################################################################
#      $URL: http://perlcritic.tigris.org/svn/perlcritic/trunk/distributions/Perl-Critic/lib/Perl/Critic/Policy/ClassHierarchies/ProhibitExplicitISA.pm $
#     $Date: 2010-06-13 18:26:31 -0500 (Sun, 13 Jun 2010) $
#   $Author: clonezone $
# $Revision: 3824 $
##############################################################################
package Perl::Critic::Policy::ClassHierarchies::ProhibitExplicitISA;
use 5.006001;
use strict;
use warnings;
use Readonly;
use Perl::Critic::Utils qw{ :severities };
use base 'Perl::Critic::Policy';
our $VERSION = '1.107_001';
#-----------------------------------------------------------------------------
Readonly::Scalar my $DESC => q{@ISA used instead of "use base"}; ## no critic (RequireInterpolation)
Readonly::Scalar my $EXPL => [ 360 ];
#-----------------------------------------------------------------------------
sub supported_parameters { return ()                         }
sub default_severity     { return $SEVERITY_MEDIUM           }
sub default_themes       { return qw( core maintenance pbp ) }
sub applies_to           { return 'PPI::Token::Symbol'       }
#-----------------------------------------------------------------------------
sub violates {
    my ($self, $elem, undef) = @_;
    if( $elem eq q{@ISA} ) {  ## no critic (RequireInterpolation)
        return $self->violation( $DESC, $EXPL, $elem );
    }
    return; #ok!
}
1;
#-----------------------------------------------------------------------------
__END__
=pod
=head1 NAME
Perl::Critic::Policy::ClassHierarchies::ProhibitExplicitISA - Employ C<use base> instead of C<@ISA>.
=head1 AFFILIATION
This Policy is part of the core L<Perl::Critic|Perl::Critic>
distribution.
=head1 DESCRIPTION
Conway recommends employing C<use base qw(Foo)> instead of the usual
C<our @ISA = qw(Foo)> because the former happens at compile time and
the latter at runtime.  The L<base|base> pragma also automatically loads
C<Foo> for you so you save a line of easily-forgotten code.
=head1 CONFIGURATION
This Policy is not configurable except for the standard options.
=head1 NOTE
Some people prefer L<parent|parent> over L<base|base>.
=head1 AUTHOR
Chris Dolan <cdolan@cpan.org>
=head1 COPYRIGHT
Copyright (c) 2006-2010 Chris Dolan.
This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=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 :