X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoose%2FMeta%2FTypeConstraint%2FClass.pm;h=5148a5c8f6f335aa872c4e09e7636cc25dfdb449;hb=38bf0e17a192755de0bee58818581b058d3b8957;hp=888d1ae45451556f0d23b5e21291a1fa6e43a7d1;hpb=fb4fcfee39263ca3983e28f840f38185282d4327;p=gitmo%2FMoose.git

diff --git a/lib/Moose/Meta/TypeConstraint/Class.pm b/lib/Moose/Meta/TypeConstraint/Class.pm
index 888d1ae..5148a5c 100644
--- a/lib/Moose/Meta/TypeConstraint/Class.pm
+++ b/lib/Moose/Meta/TypeConstraint/Class.pm
@@ -7,7 +7,7 @@ use metaclass;
 use Scalar::Util 'blessed';
 use Moose::Util::TypeConstraints ();
 
-our $VERSION   = '0.57';
+our $VERSION   = '0.72';
 $VERSION = eval $VERSION;
 our $AUTHORITY = 'cpan:STEVAN';
 
@@ -61,6 +61,7 @@ sub equals {
 
     my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
 
+    return unless defined $other;
     return unless $other->isa(__PACKAGE__);
 
     return $self->class eq $other->class;
@@ -83,6 +84,8 @@ sub is_subtype_of {
     }
 
     my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name_or_class);
+    
+    return unless defined $type;
 
     if ( $type->isa(__PACKAGE__) ) {
         # if $type_or_name_or_class isn't a class, it might be the TC name of another ::Class type
@@ -94,6 +97,15 @@ sub is_subtype_of {
     }
 }
 
+# This is a bit counter-intuitive, but a child type of a Class type
+# constraint is not itself a Class type constraint (it has no class
+# attribute). This whole create_child_type thing needs some changing
+# though, probably making MMC->new a factory or something.
+sub create_child_type {
+    my ($self, @args) = @_;
+    return Moose::Meta::TypeConstraint->new(@args, parent => $self);
+}
+
 1;
 
 __END__
@@ -104,29 +116,56 @@ __END__
 
 Moose::Meta::TypeConstraint::Class - Class/TypeConstraint parallel hierarchy
 
+=head1 DESCRIPTION
+
+This class represents type constraints for a class.
+
+=head1 INHERITANCE
+
+C<Moose::Meta::TypeConstraint::Class> is a subclass of
+L<Moose::Meta::TypeConstraint>.
+
 =head1 METHODS
 
 =over 4
 
-=item B<new>
+=item B<< Moose::Meta::TypeConstraint::Class->new(%options) >>
+
+This creates a new class 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<class>, which is name of the
+constraint's class.  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->class >>
 
-=item B<class>
+Returns the class 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 its parent
+classes.
 
-=item B<equals>
+=item B<< $constraint->is_a_subtype_of($type_name_or_object) >>
 
-=item B<is_a_type_of>
+If the given type is also a class type, then this checks that the
+type's class is a subclass of the other type's class.
 
-=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::Class> object!
 
 =back
 
@@ -142,7 +181,7 @@ 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>