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1 | package MooseX::ClassAttribute::Trait::Application::ToRole; |
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2 | |
3 | use strict; |
4 | use warnings; |
5 | |
6 | use Moose::Util::MetaRole; |
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7 | use MooseX::ClassAttribute::Trait::Application::ToClass; |
8 | use MooseX::ClassAttribute::Trait::Application::ToInstance; |
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9 | |
10 | use namespace::autoclean; |
11 | use Moose::Role; |
12 | |
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13 | with 'MooseX::ClassAttribute::Trait::Application'; |
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14 | |
15 | sub apply_class_attributes { |
16 | my $self = shift; |
17 | my $role1 = shift; |
18 | my $role2 = shift; |
19 | |
20 | $role2 = Moose::Util::MetaRole::apply_metaclass_roles( |
21 | for => $role2, |
22 | role_metaroles => { |
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23 | role => ['MooseX::ClassAttribute::Trait::Role'], |
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24 | application_to_class => |
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25 | ['MooseX::ClassAttribute::Trait::Application::ToClass'], |
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26 | application_to_role => |
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27 | ['MooseX::ClassAttribute::Trait::Application::ToRole'], |
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28 | application_to_instance => [ |
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29 | 'MooseX::ClassAttribute::Trait::Application::ToInstance' |
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30 | ], |
31 | }, |
32 | ); |
33 | |
34 | foreach my $attribute_name ( $role1->get_class_attribute_list() ) { |
35 | if ( $role2->has_class_attribute($attribute_name) |
36 | && $role2->get_class_attribute($attribute_name) |
37 | != $role1->get_class_attribute($attribute_name) ) { |
38 | |
39 | require Moose; |
40 | Moose->throw_error( "Role '" |
41 | . $role1->name() |
42 | . "' has encountered a class attribute conflict " |
43 | . "during composition. This is fatal error and cannot be disambiguated." |
44 | ); |
45 | } |
46 | else { |
47 | $role2->add_class_attribute( |
48 | $role1->get_class_attribute($attribute_name)->clone() ); |
49 | } |
50 | } |
51 | } |
52 | |
53 | 1; |