X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoose%2FMeta%2FTypeConstraint%2FRole.pm;h=d90a6ac55a81d2ffc86ef70b4ee9fbdf1b91a63e;hb=2870fb091b5b844678277347a8c710dd58e005e6;hp=5ae68f75d239c8bf9a2dc588e8a30ebeaebdd08e;hpb=93cc8330c689c1eb92171550e5fabb628a8759a6;p=gitmo%2FMoose.git

diff --git a/lib/Moose/Meta/TypeConstraint/Role.pm b/lib/Moose/Meta/TypeConstraint/Role.pm
index 5ae68f7..d90a6ac 100644
--- a/lib/Moose/Meta/TypeConstraint/Role.pm
+++ b/lib/Moose/Meta/TypeConstraint/Role.pm
@@ -7,7 +7,8 @@ use metaclass;
 use Scalar::Util 'blessed';
 use Moose::Util::TypeConstraints ();
 
-our $VERSION   = '0.54';
+our $VERSION   = '0.72';
+$VERSION = eval $VERSION;
 our $AUTHORITY = 'cpan:STEVAN';
 
 use base 'Moose::Meta::TypeConstraint';
@@ -20,7 +21,7 @@ sub new {
     my ( $class, %args ) = @_;
 
     $args{parent} = Moose::Util::TypeConstraints::find_type_constraint('Role');
-    my $self      = $class->meta->new_object(%args);
+    my $self      = $class->_new(\%args);
 
     $self->_create_hand_optimized_type_constraint;
     $self->compile_type_constraint();
@@ -58,6 +59,7 @@ sub equals {
 
     my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
 
+    return unless defined $other;
     return unless $other->isa(__PACKAGE__);
 
     return $self->role eq $other->role;
@@ -66,7 +68,7 @@ sub equals {
 sub is_a_type_of {
     my ($self, $type_or_name) = @_;
 
-    my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
+ $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
 
     ($self->equals($type) || $self->is_subtype_of($type_or_name));
 }
@@ -81,6 +83,8 @@ sub is_subtype_of {
 
     my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name_or_role);
 
+    return unless defined $type;
+    
     if ( $type->isa(__PACKAGE__) ) {
         # if $type_or_name_or_role isn't a role, it might be the TC name of another ::Role type
         # or it could also just be a type object in this branch
@@ -91,6 +95,11 @@ sub is_subtype_of {
     }
 }
 
+sub create_child_type {
+    my ($self, @args) = @_;
+    return Moose::Meta::TypeConstraint->new(@args, parent => $self);
+}
+
 1;
 
 __END__
@@ -101,29 +110,56 @@ __END__
 
 Moose::Meta::TypeConstraint::Role - Role/TypeConstraint parallel hierarchy
 
+=head1 DESCRIPTION
+
+This class represents type constraints for a role.
+
+=head1 INHERITANCE
+
+C<Moose::Meta::TypeConstraint::Role> is a subclass of
+L<Moose::Meta::TypeConstraint>.
+
 =head1 METHODS
 
 =over 4
 
-=item B<new>
+=item B<< Moose::Meta::TypeConstraint::Role->new(%options) >>
+
+This creates a new role type constraint based on the given
+C<%options>.
+
+It takes the same options as its parent, with two exceptions. First,
+it requires an additional option, C<role>, which is name of the
+constraint's role.  Second, it automatically sets the parent to the
+C<Object> type.
+
+The constructor also overrides the hand optimized type constraint with
+one it creates internally.
+
+=item B<< $constraint->role >>
 
-=item B<role>
+Returns the role name associated with the constraint.
 
-=item B<hand_optimized_type_constraint>
+=item B<< $constraint->parents >>
 
-=item B<has_hand_optimized_type_constraint>
+Returns all the type's parent types, corresponding to the roles that
+its role does.
 
-=item B<equals>
+=item B<< $constraint->is_subtype_of($type_name_or_object) >>
 
-=item B<is_a_type_of>
+If the given type is also a role type, then this checks that the
+type's role does the other type's role.
 
-=item B<is_subtype_of>
+Otherwise it falls back to the implementation in
+L<Moose::Meta::TypeConstraint>.
 
-=item B<parents>
+=item B<< $constraint->create_child_type(%options) >>
 
-Return all the parent types, corresponding to the parent classes.
+This returns a new L<Moose::Meta::TypeConstraint> object with the type
+as its parent.
 
-=item B<meta>
+Note that it does I<not> return a C<Moose::Meta::TypeConstraint::Role>
+object!
 
 =back
 
@@ -139,7 +175,7 @@ Yuval Kogman E<lt>nothingmuch@cpan.orgE<gt>
 
 =head1 COPYRIGHT AND LICENSE
 
-Copyright 2006-2008 by Infinity Interactive, Inc.
+Copyright 2006-2009 by Infinity Interactive, Inc.
 
 L<http://www.iinteractive.com>