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1 | |
2 | package MooseX::AttributeHelpers::Counter; |
3 | use Moose; |
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4 | use MooseX::AttributeHelpers::Sugar; |
5 | |
6 | extends 'MooseX::AttributeHelpers::Base'; |
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7 | |
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8 | our $VERSION = '0.03'; |
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9 | our $AUTHORITY = 'cpan:STEVAN'; |
10 | |
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11 | define_attribute_helper ( |
12 | default_options => { |
13 | is => 'ro', |
14 | default => 0, |
15 | }, |
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16 | |
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17 | helper_type => 'Num', |
18 | method_provider => 'MooseX::AttributeHelpers::MethodProvider::Counter', |
19 | auto_provide => 1, |
20 | shortcut => 'Counter', |
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21 | ); |
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22 | |
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23 | no Moose; |
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24 | no MooseX::AttributeHelpers::Sugar; |
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25 | |
26 | 1; |
27 | |
28 | __END__ |
29 | |
30 | =pod |
31 | |
32 | =head1 NAME |
33 | |
34 | MooseX::AttributeHelpers::Counter |
35 | |
36 | =head1 SYNOPSIS |
37 | |
38 | package MyHomePage; |
39 | use Moose; |
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40 | use MooseX::AttributeHelpers; |
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41 | |
42 | has 'counter' => ( |
43 | metaclass => 'Counter', |
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44 | is => 'ro', |
45 | isa => 'Num', |
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46 | default => sub { 0 }, |
47 | provides => { |
48 | inc => 'inc_counter', |
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49 | dec => 'dec_counter', |
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50 | reset => 'reset_counter', |
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51 | } |
52 | ); |
53 | |
54 | my $page = MyHomePage->new(); |
55 | $page->inc_counter; # same as $page->counter($page->counter + 1); |
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56 | $page->dec_counter; # same as $page->counter($page->counter - 1); |
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57 | |
58 | =head1 DESCRIPTION |
59 | |
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60 | This module provides a simple counter attribute, which can be incremented and |
61 | decremented. It is important to note that all those methods do in place |
62 | modification of the value stored in the attribute. |
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63 | |
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64 | If your attribute definition does not include any of I<is>, I<isa>, |
65 | I<default> or I<provides> but does use the C<Counter> metaclass, |
66 | then this module applies defaults as in the L</SYNOPSIS> |
67 | above. This allows for a very basic counter definition: |
68 | |
69 | has 'foo' => (metaclass => 'Counter'); |
70 | $obj->inc_foo; |
71 | |
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72 | =head1 PROVIDED METHODS |
73 | |
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74 | The methods for this metaclass are provided by |
75 | L<MooseX::AttributeHelpers::MethodProvider::Counter>. |
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76 | |
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77 | =head1 BUGS |
78 | |
79 | All complex software has bugs lurking in it, and this module is no |
80 | exception. If you find a bug please either email me, or add the bug |
81 | to cpan-RT. |
82 | |
83 | =head1 AUTHOR |
84 | |
85 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
86 | |
87 | =head1 COPYRIGHT AND LICENSE |
88 | |
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89 | Copyright 2007-2008 by Infinity Interactive, Inc. |
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90 | |
91 | L<http://www.iinteractive.com> |
92 | |
93 | This library is free software; you can redistribute it and/or modify |
94 | it under the same terms as Perl itself. |
95 | |
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96 | =cut |