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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
package Moose::Meta::Attribute::Native::Trait::Counter;
use Moose::Role;
our $VERSION = '1.09';
$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
use Moose::Meta::Attribute::Native::MethodProvider::Counter;
with 'Moose::Meta::Attribute::Native::Trait';
has 'method_provider' => (
is => 'ro',
isa => 'ClassName',
predicate => 'has_method_provider',
default => 'Moose::Meta::Attribute::Native::MethodProvider::Counter',
);
sub _default_default { 0 }
sub _default_is { 'ro' }
sub _helper_type { 'Num' }
no Moose::Role;
1;
__END__
=pod
=head1 NAME
Moose::Meta::Attribute::Native::Trait::Counter - Helper trait for counters
=head1 SYNOPSIS
package MyHomePage;
use Moose;
has 'counter' => (
traits => ['Counter'],
is => 'ro',
isa => 'Num',
default => 0,
handles => {
inc_counter => 'inc',
dec_counter => 'dec',
reset_counter => 'reset',
},
);
my $page = MyHomePage->new();
$page->inc_counter; # same as $page->counter( $page->counter + 1 );
$page->dec_counter; # same as $page->counter( $page->counter - 1 );
my $count_by_twos = 2;
$page->inc_counter($count_by_twos);
=head1 DESCRIPTION
This module provides a simple counter attribute, which can be
incremented and decremented by arbitrary amounts. The default
amount of change is one.
=head1 PROVIDED METHODS
These methods are implemented in
L<Moose::Meta::Attribute::Native::MethodProvider::Counter>. It is important to
note that all those methods do in place modification of the value stored in
the attribute.
=over 4
=item B<set($value)>
Set the counter to the specified value.
=item B<inc($arg)>
Increase the attribute value by the amount of the argument.
No argument increments the value by 1.
=item B<dec($arg)>
Decrease the attribute value by the amount of the argument.
No argument decrements the value by 1.
=item B<reset>
Resets the value stored in this slot to it's default value.
=back
=head1 METHODS
=over 4
=item B<meta>
=item B<method_provider>
=item B<has_method_provider>
=back
=head1 BUGS
See L<Moose/BUGS> for details on reporting bugs.
=head1 AUTHOR
Stevan Little E<lt>stevan@iinteractive.comE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright 2007-2009 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut
|
