Commit | Line | Data |
620db045 |
1 | package Moose::Meta::TypeConstraint::Role; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use metaclass; |
6 | |
7 | use Scalar::Util 'blessed'; |
8 | use Moose::Util::TypeConstraints (); |
9 | |
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10 | our $VERSION = '0.51'; |
620db045 |
11 | our $AUTHORITY = 'cpan:STEVAN'; |
12 | |
13 | use base 'Moose::Meta::TypeConstraint'; |
14 | |
15 | __PACKAGE__->meta->add_attribute('role' => ( |
16 | reader => 'role', |
17 | )); |
18 | |
19 | sub new { |
20 | my ( $class, %args ) = @_; |
21 | |
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22 | $args{parent} = Moose::Util::TypeConstraints::find_type_constraint('Role'); |
620db045 |
23 | my $self = $class->meta->new_object(%args); |
24 | |
25 | $self->_create_hand_optimized_type_constraint; |
26 | $self->compile_type_constraint(); |
27 | |
28 | return $self; |
29 | } |
30 | |
31 | sub _create_hand_optimized_type_constraint { |
32 | my $self = shift; |
33 | my $role = $self->role; |
34 | $self->hand_optimized_type_constraint( |
35 | sub { Moose::Util::does_role($_[0], $role) } |
36 | ); |
37 | } |
38 | |
39 | sub parents { |
40 | my $self = shift; |
41 | return ( |
42 | $self->parent, |
43 | map { |
44 | # FIXME find_type_constraint might find a TC named after the role but that isn't really it |
45 | # I did this anyway since it's a convention that preceded TypeConstraint::Role, and it should DWIM |
46 | # if anybody thinks this problematic please discuss on IRC. |
47 | # a possible fix is to add by attr indexing to the type registry to find types of a certain property |
48 | # regardless of their name |
49 | Moose::Util::TypeConstraints::find_type_constraint($_) |
50 | || |
51 | __PACKAGE__->new( role => $_, name => "__ANON__" ) |
52 | } @{ $self->role->meta->get_roles }, |
53 | ); |
54 | } |
55 | |
56 | sub equals { |
57 | my ( $self, $type_or_name ) = @_; |
58 | |
59 | my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name); |
60 | |
61 | return unless $other->isa(__PACKAGE__); |
62 | |
63 | return $self->role eq $other->role; |
64 | } |
65 | |
66 | sub is_a_type_of { |
67 | my ($self, $type_or_name) = @_; |
68 | |
69 | my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name); |
70 | |
71 | ($self->equals($type) || $self->is_subtype_of($type_or_name)); |
72 | } |
73 | |
74 | sub is_subtype_of { |
75 | my ($self, $type_or_name_or_role ) = @_; |
76 | |
77 | if ( not ref $type_or_name_or_role ) { |
78 | # it might be a role |
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79 | return 1 if $self->role->meta->does_role( $type_or_name_or_role ); |
620db045 |
80 | } |
81 | |
82 | my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name_or_role); |
83 | |
84 | if ( $type->isa(__PACKAGE__) ) { |
85 | # if $type_or_name_or_role isn't a role, it might be the TC name of another ::Role type |
86 | # or it could also just be a type object in this branch |
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87 | return $self->role->meta->does_role( $type->role ); |
620db045 |
88 | } else { |
89 | # the only other thing we are a subtype of is Object |
90 | $self->SUPER::is_subtype_of($type); |
91 | } |
92 | } |
93 | |
94 | 1; |
95 | |
96 | __END__ |
97 | |
98 | =pod |
99 | |
100 | =head1 NAME |
101 | |
102 | Moose::Meta::TypeConstraint::Role - Role/TypeConstraint parallel hierarchy |
103 | |
104 | =head1 METHODS |
105 | |
106 | =over 4 |
107 | |
108 | =item B<new> |
109 | |
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110 | =item B<role> |
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111 | |
112 | =item B<hand_optimized_type_constraint> |
113 | |
114 | =item B<has_hand_optimized_type_constraint> |
115 | |
116 | =item B<equals> |
117 | |
118 | =item B<is_a_type_of> |
119 | |
120 | =item B<is_subtype_of> |
121 | |
122 | =item B<parents> |
123 | |
124 | Return all the parent types, corresponding to the parent classes. |
125 | |
126 | =item B<meta> |
127 | |
128 | =back |
129 | |
130 | =head1 BUGS |
131 | |
132 | All complex software has bugs lurking in it, and this module is no |
133 | exception. If you find a bug please either email me, or add the bug |
134 | to cpan-RT. |
135 | |
136 | =head1 AUTHOR |
137 | |
138 | Yuval Kogman E<lt>nothingmuch@cpan.orgE<gt> |
139 | |
140 | =head1 COPYRIGHT AND LICENSE |
141 | |
142 | Copyright 2006-2008 by Infinity Interactive, Inc. |
143 | |
144 | L<http://www.iinteractive.com> |
145 | |
146 | This library is free software; you can redistribute it and/or modify |
147 | it under the same terms as Perl itself. |
148 | |
149 | =cut |