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1 | package MooseX::AttributeHelpers::Number; |
2 | use Moose; |
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3 | |
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4 | our $VERSION = '0.02'; |
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5 | our $AUTHORITY = 'cpan:STEVAN'; |
6 | |
7 | extends 'MooseX::AttributeHelpers::Base'; |
8 | |
9 | sub helper_type { 'Num' } |
10 | |
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11 | # NOTE: |
12 | # we don't use the method provider for this |
13 | # module since many of the names of the provied |
14 | # methods would conflict with keywords |
15 | # - SL |
16 | |
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17 | has '+method_constructors' => ( |
18 | default => sub { |
19 | return +{ |
20 | set => sub { |
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21 | my ($attr, $reader, $writer) = @_; |
22 | return sub { $writer->($_[0], $_[1]) }; |
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23 | }, |
24 | add => sub { |
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25 | my ($attr, $reader, $writer) = @_; |
26 | return sub { $writer->($_[0], $reader->($_[0]) + $_[1]) }; |
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27 | }, |
28 | sub => sub { |
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29 | my ($attr, $reader, $writer) = @_; |
30 | return sub { $writer->($_[0], $reader->($_[0]) - $_[1]) }; |
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31 | }, |
32 | mul => sub { |
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33 | my ($attr, $reader, $writer) = @_; |
34 | return sub { $writer->($_[0], $reader->($_[0]) * $_[1]) }; |
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35 | }, |
36 | div => sub { |
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37 | my ($attr, $reader, $writer) = @_; |
38 | return sub { $writer->($_[0], $reader->($_[0]) / $_[1]) }; |
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39 | }, |
40 | mod => sub { |
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41 | my ($attr, $reader, $writer) = @_; |
42 | return sub { $writer->($_[0], $reader->($_[0]) % $_[1]) }; |
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43 | }, |
44 | abs => sub { |
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45 | my ($attr, $reader, $writer) = @_; |
46 | return sub { $writer->($_[0], abs($reader->($_[0])) ) }; |
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47 | }, |
48 | } |
49 | } |
50 | ); |
51 | |
52 | no Moose; |
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53 | |
54 | # register the alias ... |
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55 | package # hide me from search.cpan.org |
56 | Moose::Meta::Attribute::Custom::Number; |
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57 | sub register_implementation { 'MooseX::AttributeHelpers::Number' } |
58 | |
59 | 1; |
60 | |
61 | =pod |
62 | |
63 | =head1 NAME |
64 | |
65 | MooseX::AttributeHelpers::Number |
66 | |
67 | =head1 SYNOPSIS |
68 | |
69 | package Real; |
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70 | use Moose; |
71 | use MooseX::AttributeHelpers; |
72 | |
73 | has 'integer' => ( |
74 | metaclass => 'Number', |
75 | is => 'ro', |
76 | isa => 'Int', |
77 | default => sub { 5 }, |
78 | provides => { |
79 | set => 'set', |
80 | add => 'add', |
81 | sub => 'sub', |
82 | mul => 'mul', |
83 | div => 'div', |
84 | mod => 'mod', |
85 | abs => 'abs', |
86 | } |
87 | ); |
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88 | |
89 | my $real = Real->new(); |
90 | $real->add(5); # same as $real->integer($real->integer + 5); |
91 | $real->sub(2); # same as $real->integer($real->integer - 2); |
92 | |
93 | =head1 DESCRIPTION |
94 | |
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95 | This provides a simple numeric attribute, which supports most of the |
96 | basic math operations. |
97 | |
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98 | =head1 METHODS |
99 | |
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100 | =over 4 |
101 | |
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102 | =item B<meta> |
103 | |
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104 | =item B<helper_type> |
105 | |
106 | =item B<method_constructors> |
107 | |
108 | =back |
109 | |
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110 | =head1 PROVIDED METHODS |
111 | |
112 | It is important to note that all those methods do in place |
113 | modification of the value stored in the attribute. |
114 | |
115 | =over 4 |
116 | |
117 | =item I<set ($value)> |
118 | |
119 | Alternate way to set the value. |
120 | |
121 | =item I<add ($value)> |
122 | |
123 | Adds the current value of the attribute to C<$value>. |
124 | |
125 | =item I<sub ($value)> |
126 | |
127 | Subtracts the current value of the attribute to C<$value>. |
128 | |
129 | =item I<mul ($value)> |
130 | |
131 | Multiplies the current value of the attribute to C<$value>. |
132 | |
133 | =item I<div ($value)> |
134 | |
135 | Divides the current value of the attribute to C<$value>. |
136 | |
137 | =item I<mod ($value)> |
138 | |
139 | Modulus the current value of the attribute to C<$value>. |
140 | |
141 | =item I<abs> |
142 | |
143 | Sets the current value of the attribute to its absolute value. |
144 | |
145 | =back |
146 | |
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147 | =head1 BUGS |
148 | |
149 | All complex software has bugs lurking in it, and this module is no |
150 | exception. If you find a bug please either email me, or add the bug |
151 | to cpan-RT. |
152 | |
153 | =head1 AUTHOR |
154 | |
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155 | Robert Boone |
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156 | |
157 | =head1 COPYRIGHT AND LICENSE |
158 | |
159 | Copyright 2007 by Infinity Interactive, Inc. |
160 | |
161 | L<http://www.iinteractive.com> |
162 | |
163 | This library is free software; you can redistribute it and/or modify |
164 | it under the same terms as Perl itself. |
165 | |
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166 | =cut |