1MooseX::ClassAttribute(U3s)er Contributed Perl DocumentatMiooonseX::ClassAttribute(3)
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6 MooseX::ClassAttribute - Declare class attributes Moose-style
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9 version 0.16
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12 package My::Class;
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14 use Moose;
15 use MooseX::ClassAttribute;
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17 class_has 'Cache' =>
18 ( is => 'rw',
19 isa => 'HashRef',
20 default => sub { {} },
21 );
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23 __PACKAGE__->meta()->make_immutable();
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25 no Moose;
26 no MooseX::ClassAttribute;
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28 # then later ...
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30 My::Class->Cache()->{thing} = ...;
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33 This module allows you to declare class attributes in exactly the same
34 way as object attributes, using "class_has()" instead of "has()".
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36 You can use any feature of Moose's attribute declarations, including
37 overriding a parent's attributes, delegation ("handles"), attribute
38 traits, etc. All features should just work. The one exception is the
39 "required" flag, which is not allowed for class attributes.
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41 The accessor methods for class attribute may be called on the class
42 directly, or on objects of that class. Passing a class attribute to the
43 constructor will not set that attribute.
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46 This class exports one function when you use it, "class_has()". This
47 works exactly like Moose's "has()", but it declares class attributes.
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49 One little nit is that if you include "no Moose" in your class, you
50 won't remove the "class_has()" function. To do that you must include
51 "no MooseX::ClassAttribute" as well. Or you can just use
52 namespace::autoclean instead.
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54 Implementation and Immutability
55 This module will add a role to your class's metaclass, See
56 MooseX::ClassAttribute::Trait::Class for details. This role provides
57 introspection methods for class attributes.
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59 Class attributes themselves do the
60 MooseX::ClassAttribute::Trait::Attribute role.
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62 There is also a MooseX::ClassAttribute::Meta::Method::Accessor which
63 provides part of the inlining implementation for class attributes.
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65 Cooperation with Metaclasses and Traits
66 This module should work with most attribute metaclasses and traits, but
67 it's possible that conflicts could occur. This module has been tested
68 to work with Moose's native traits.
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70 Class Attributes in Roles
71 You can add a class attribute to a role. When that role is applied to a
72 class, the class will have the relevant class attributes added. Note
73 that attribute defaults will be calculated when the class attribute is
74 composed into the class.
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77 If you'd like to thank me for the work I've done on this module, please
78 consider making a "donation" to me via PayPal. I spend a lot of free
79 time creating free software, and would appreciate any support you'd
80 care to offer.
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82 Please note that I am not suggesting that you must do this in order for
83 me to continue working on this particular software. I will continue to
84 do so, inasmuch as I have in the past, for as long as it interests me.
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86 Similarly, a donation made in this way will probably not make me work
87 on this software much more, unless I get so many donations that I can
88 consider working on free software full time, which seems unlikely at
89 best.
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91 To donate, log into PayPal and send money to autarch@urth.org or use
92 the button on this page: http://www.urth.org/~autarch/fs-donation.html
93 <http://www.urth.org/~autarch/fs-donation.html>
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96 Please report any bugs or feature requests to
97 "bug-moosex-classattribute@rt.cpan.org", or through the web interface
98 at <http://rt.cpan.org>. I will be notified, and then you'll
99 automatically be notified of progress on your bug as I make changes.
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102 Dave Rolsky <autarch@urth.org>
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105 This software is Copyright (c) 2010 by Dave Rolsky.
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107 This is free software, licensed under:
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109 The Artistic License 2.0
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113perl v5.12.2 2010-07-15 MooseX::ClassAttribute(3)