1 package Moose::Meta::TypeConstraint::Class;
7 use Scalar::Util 'blessed';
8 use Moose::Util::TypeConstraints ();
10 use base 'Moose::Meta::TypeConstraint';
12 __PACKAGE__->meta->add_attribute('class' => (
17 my ( $class, %args ) = @_;
19 $args{parent} = Moose::Util::TypeConstraints::find_type_constraint('Object');
20 my $self = $class->_new(\%args);
22 $self->_create_hand_optimized_type_constraint;
23 $self->compile_type_constraint();
28 sub _create_hand_optimized_type_constraint {
30 my $class = $self->class;
31 $self->hand_optimized_type_constraint(
33 blessed( $_[0] ) && blessed( $_[0] ) ne 'Regexp' && $_[0]->isa($class)
43 # FIXME find_type_constraint might find a TC named after the class but that isn't really it
44 # I did this anyway since it's a convention that preceded TypeConstraint::Class, and it should DWIM
45 # if anybody thinks this problematic please discuss on IRC.
46 # a possible fix is to add by attr indexing to the type registry to find types of a certain property
47 # regardless of their name
48 Moose::Util::TypeConstraints::find_type_constraint($_)
50 __PACKAGE__->new( class => $_, name => "__ANON__" )
51 } Class::MOP::class_of($self->class)->superclasses,
56 my ( $self, $type_or_name ) = @_;
58 my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
60 return unless defined $other;
61 return unless $other->isa(__PACKAGE__);
63 return $self->class eq $other->class;
67 my ($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_class ) = @_;
77 my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name_or_class);
79 if ( not defined $type ) {
80 if ( not ref $type_or_name_or_class ) {
82 return 1 if $self->class->isa( $type_or_name_or_class );
87 if ( $type->isa(__PACKAGE__) && $type->class ne $self->class) {
88 # if $type_or_name_or_class isn't a class, it might be the TC name of another ::Class type
89 # or it could also just be a type object in this branch
90 return $self->class->isa( $type->class );
92 # the only other thing we are a subtype of is Object
93 $self->SUPER::is_subtype_of($type);
97 # This is a bit counter-intuitive, but a child type of a Class type
98 # constraint is not itself a Class type constraint (it has no class
99 # attribute). This whole create_child_type thing needs some changing
100 # though, probably making MMC->new a factory or something.
101 sub create_child_type {
102 my ($self, @args) = @_;
103 return Moose::Meta::TypeConstraint->new(@args, parent => $self);
110 if ($self->has_message) {
111 return $self->SUPER::get_message(@_);
114 $value = (defined $value ? overload::StrVal($value) : 'undef');
115 return "Validation failed for '" . $self->name . "' with value $value (not isa " . $self->class . ")";
120 # ABSTRACT: Class/TypeConstraint parallel hierarchy
128 This class represents type constraints for a class.
132 C<Moose::Meta::TypeConstraint::Class> is a subclass of
133 L<Moose::Meta::TypeConstraint>.
139 =item B<< Moose::Meta::TypeConstraint::Class->new(%options) >>
141 This creates a new class type constraint based on the given
144 It takes the same options as its parent, with two exceptions. First,
145 it requires an additional option, C<class>, which is name of the
146 constraint's class. Second, it automatically sets the parent to the
149 The constructor also overrides the hand optimized type constraint with
150 one it creates internally.
152 =item B<< $constraint->class >>
154 Returns the class name associated with the constraint.
156 =item B<< $constraint->parents >>
158 Returns all the type's parent types, corresponding to its parent
161 =item B<< $constraint->is_subtype_of($type_name_or_object) >>
163 If the given type is also a class type, then this checks that the
164 type's class is a subclass of the other type's class.
166 Otherwise it falls back to the implementation in
167 L<Moose::Meta::TypeConstraint>.
169 =item B<< $constraint->create_child_type(%options) >>
171 This returns a new L<Moose::Meta::TypeConstraint> object with the type
174 Note that it does I<not> return a
175 C<Moose::Meta::TypeConstraint::Class> object!
177 =item B<< $constraint->get_message($value) >>
179 This is the same as L<Moose::Meta::TypeConstraint/get_message> except
180 that it explicitly says C<isa> was checked. This is to help users deal
181 with accidentally autovivified type constraints.
187 See L<Moose/BUGS> for details on reporting bugs.