1 package MooseX::ClassAttribute;
7 our $AUTHORITY = 'cpan:DROLSKY';
11 use MooseX::ClassAttribute::Trait::Class;
12 use MooseX::ClassAttribute::Trait::Role;
13 use MooseX::ClassAttribute::Trait::Application::ToClass;
14 use MooseX::ClassAttribute::Trait::Application::ToRole;
16 Moose::Exporter->setup_import_methods(
17 with_meta => ['class_has'],
19 class => ['MooseX::ClassAttribute::Trait::Class'],
22 role => ['MooseX::ClassAttribute::Trait::Role'],
23 application_to_class =>
24 ['MooseX::ClassAttribute::Trait::Application::ToClass'],
25 application_to_role =>
26 ['MooseX::ClassAttribute::Trait::Application::ToRole'],
35 my $attrs = ref $name eq 'ARRAY' ? $name : [$name];
37 $meta->add_class_attribute( $_, %options ) for @{$attrs};
48 MooseX::ClassAttribute - Declare class attributes Moose-style
55 use MooseX::ClassAttribute;
60 default => sub { {} },
63 __PACKAGE__->meta()->make_immutable();
66 no MooseX::ClassAttribute;
70 My::Class->Cache()->{thing} = ...;
74 This module allows you to declare class attributes in exactly the same
75 way as object attributes, using C<class_has()> instead of C<has()>.
77 You can use any feature of Moose's attribute declarations, including
78 overriding a parent's attributes, delegation (C<handles>), attribute traits,
79 etc. All features should just work. The one exception is the "required" flag,
80 which is not allowed for class attributes.
82 The accessor methods for class attribute may be called on the class
83 directly, or on objects of that class. Passing a class attribute to
84 the constructor will not set that attribute.
88 This class exports one function when you use it, C<class_has()>. This
89 works exactly like Moose's C<has()>, but it declares class attributes.
91 One little nit is that if you include C<no Moose> in your class, you won't
92 remove the C<class_has()> function. To do that you must include C<no
93 MooseX::ClassAttribute> as well. Or you can just use L<namespace::autoclean>
96 =head2 Implementation and Immutability
98 This module will add a role to your class's metaclass, See
99 L<MooseX::ClassAttribute::Trait::Class> for details. This role
100 provides introspection methods for class attributes.
102 Class attributes themselves do the
103 L<MooseX::ClassAttribute::Trait::Attribute> role.
105 There is also a L<MooseX::ClassAttribute::Meta::Method::Accessor>
106 which provides part of the inlining implementation for class
109 =head2 Cooperation with Metaclasses and Traits
111 This module should work with most attribute metaclasses and traits,
112 but it's possible that conflicts could occur. This module has been
113 tested to work with Moose's native traits.
115 =head2 Class Attributes in Roles
117 You can add a class attribute to a role. When that role is applied to a class,
118 the class will have the relevant class attributes added. Note that attribute
119 defaults will be calculated when the class attribute is composed into the
124 If you'd like to thank me for the work I've done on this module,
125 please consider making a "donation" to me via PayPal. I spend a lot of
126 free time creating free software, and would appreciate any support
129 Please note that B<I am not suggesting that you must do this> in order
130 for me to continue working on this particular software. I will
131 continue to do so, inasmuch as I have in the past, for as long as it
134 Similarly, a donation made in this way will probably not make me work
135 on this software much more, unless I get so many donations that I can
136 consider working on free software full time, which seems unlikely at
139 To donate, log into PayPal and send money to autarch@urth.org or use
140 the button on this page:
141 L<http://www.urth.org/~autarch/fs-donation.html>
145 Dave Rolsky, C<< <autarch@urth.org> >>
149 Please report any bugs or feature requests to
150 C<bug-moosex-classattribute@rt.cpan.org>, or through the web interface
151 at L<http://rt.cpan.org>. I will be notified, and then you'll
152 automatically be notified of progress on your bug as I make changes.
154 =head1 COPYRIGHT & LICENSE
156 Copyright 2007-2010 Dave Rolsky, All Rights Reserved.
158 This program is free software; you can redistribute it and/or modify
159 it under the same terms as Perl itself.