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 0.29
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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 "no
51 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 Cooperation with Metaclasses and Traits
63 This module should work with most attribute metaclasses and traits, but
64 it's possible that conflicts could occur. This module has been tested
65 to work with Moose's native traits.
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67 Class Attributes in Roles
68 You can add a class attribute to a role. When that role is applied to a
69 class, the class will have the relevant class attributes added. Note
70 that attribute defaults will be calculated when the class attribute is
71 composed into the class.
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74 Bugs may be submitted through the RT bug tracker
75 <http://rt.cpan.org/Public/Dist/Display.html?Name=MooseX-
76 ClassAttribute> (or bug-moosex-classattribute@rt.cpan.org <mailto:bug-
77 moosex-classattribute@rt.cpan.org>).
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79 I am also usually active on IRC as 'drolsky' on "irc://irc.perl.org".
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82 If you'd like to thank me for the work I've done on this module, please
83 consider making a "donation" to me via PayPal. I spend a lot of free
84 time creating free software, and would appreciate any support you'd
85 care to offer.
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87 Please note that I am not suggesting that you must do this in order for
88 me to continue working on this particular software. I will continue to
89 do so, inasmuch as I have in the past, for as long as it interests me.
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91 Similarly, a donation made in this way will probably not make me work
92 on this software much more, unless I get so many donations that I can
93 consider working on free software full time (let's all have a chuckle
94 at that together).
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96 To donate, log into PayPal and send money to autarch@urth.org, or use
97 the button at <http://www.urth.org/~autarch/fs-donation.html>.
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100 Dave Rolsky <autarch@urth.org>
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103 • Andrew Rodland <andrew@cleverdomain.org>
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105 • Karen Etheridge <ether@cpan.org>
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107 • Rafael Kitover <rkitover@cpan.org>
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109 • Robert Buels <rmb32@cornell.edu>
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111 • Shawn M Moore <sartak@gmail.com>
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114 This software is Copyright (c) 2016 by Dave Rolsky.
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116 This is free software, licensed under:
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118 The Artistic License 2.0 (GPL Compatible)
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122perl v5.36.0 2023-01-20 MooseX::ClassAttribute(3)