1 package Moose::Meta::TypeConstraint::Role;
7 use Scalar::Util 'blessed';
8 use Moose::Util::TypeConstraints ();
10 our $VERSION = '0.01';
11 our $AUTHORITY = 'cpan:STEVAN';
13 use base 'Moose::Meta::TypeConstraint';
15 __PACKAGE__->meta->add_attribute('role' => (
20 my ( $class, %args ) = @_;
22 $args{parent} = Moose::Util::TypeConstraints::find_type_constraint('Role');
23 my $self = $class->meta->new_object(%args);
25 $self->_create_hand_optimized_type_constraint;
26 $self->compile_type_constraint();
31 sub _create_hand_optimized_type_constraint {
33 my $role = $self->role;
34 $self->hand_optimized_type_constraint(
35 sub { Moose::Util::does_role($_[0], $role) }
44 # FIXME find_type_constraint might find a TC named after the role but that isn't really it
45 # I did this anyway since it's a convention that preceded TypeConstraint::Role, and it should DWIM
46 # if anybody thinks this problematic please discuss on IRC.
47 # a possible fix is to add by attr indexing to the type registry to find types of a certain property
48 # regardless of their name
49 Moose::Util::TypeConstraints::find_type_constraint($_)
51 __PACKAGE__->new( role => $_, name => "__ANON__" )
52 } @{ $self->role->meta->get_roles },
57 my ( $self, $type_or_name ) = @_;
59 my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
61 return unless $other->isa(__PACKAGE__);
63 return $self->role eq $other->role;
67 my ($self, $type_or_name) = @_;
69 my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
71 ($self->equals($type) || $self->is_subtype_of($type_or_name));
75 my ($self, $type_or_name_or_role ) = @_;
77 if ( not ref $type_or_name_or_role ) {
79 return 1 if $self->role->meta->does_role( $type_or_name_or_role );
82 my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name_or_role);
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
87 return $self->role->meta->does_role( $type->role );
89 # the only other thing we are a subtype of is Object
90 $self->SUPER::is_subtype_of($type);
102 Moose::Meta::TypeConstraint::Role - Role/TypeConstraint parallel hierarchy
112 =item B<hand_optimized_type_constraint>
114 =item B<has_hand_optimized_type_constraint>
118 =item B<is_a_type_of>
120 =item B<is_subtype_of>
124 Return all the parent types, corresponding to the parent classes.
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
138 Yuval Kogman E<lt>nothingmuch@cpan.orgE<gt>
140 =head1 COPYRIGHT AND LICENSE
142 Copyright 2006-2008 by Infinity Interactive, Inc.
144 L<http://www.iinteractive.com>
146 This library is free software; you can redistribute it and/or modify
147 it under the same terms as Perl itself.