1 package Moose::Meta::TypeConstraint::Class;
7 use Scalar::Util 'blessed';
8 use Moose::Util::TypeConstraints ();
10 our $AUTHORITY = 'cpan:STEVAN';
12 use base 'Moose::Meta::TypeConstraint';
14 __PACKAGE__->meta->add_attribute('class' => (
19 my ( $class, %args ) = @_;
21 $args{parent} = Moose::Util::TypeConstraints::find_type_constraint('Object');
22 my $self = $class->_new(\%args);
24 $self->_create_hand_optimized_type_constraint;
25 $self->compile_type_constraint();
30 sub _create_hand_optimized_type_constraint {
32 my $class = $self->class;
33 $self->hand_optimized_type_constraint(
35 blessed( $_[0] ) && blessed( $_[0] ) ne 'Regexp' && $_[0]->isa($class)
45 # FIXME find_type_constraint might find a TC named after the class but that isn't really it
46 # I did this anyway since it's a convention that preceded TypeConstraint::Class, and it should DWIM
47 # if anybody thinks this problematic please discuss on IRC.
48 # a possible fix is to add by attr indexing to the type registry to find types of a certain property
49 # regardless of their name
50 Moose::Util::TypeConstraints::find_type_constraint($_)
52 __PACKAGE__->new( class => $_, name => "__ANON__" )
53 } Class::MOP::class_of($self->class)->superclasses,
58 my ( $self, $type_or_name ) = @_;
60 my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
62 return unless defined $other;
63 return unless $other->isa(__PACKAGE__);
65 return $self->class eq $other->class;
69 my ($self, $type_or_name) = @_;
71 my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
73 ($self->equals($type) || $self->is_subtype_of($type_or_name));
77 my ($self, $type_or_name_or_class ) = @_;
79 my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name_or_class);
81 if ( not defined $type ) {
82 if ( not ref $type_or_name_or_class ) {
84 return 1 if $self->class->isa( $type_or_name_or_class );
89 if ( $type->isa(__PACKAGE__) && $type->class ne $self->class) {
90 # if $type_or_name_or_class isn't a class, it might be the TC name of another ::Class type
91 # or it could also just be a type object in this branch
92 return $self->class->isa( $type->class );
94 # the only other thing we are a subtype of is Object
95 $self->SUPER::is_subtype_of($type);
99 # This is a bit counter-intuitive, but a child type of a Class type
100 # constraint is not itself a Class type constraint (it has no class
101 # attribute). This whole create_child_type thing needs some changing
102 # though, probably making MMC->new a factory or something.
103 sub create_child_type {
104 my ($self, @args) = @_;
105 return Moose::Meta::TypeConstraint->new(@args, parent => $self);
112 if ($self->has_message) {
113 return $self->SUPER::get_message(@_);
116 $value = (defined $value ? overload::StrVal($value) : 'undef');
117 return "Validation failed for '" . $self->name . "' with value $value (not isa " . $self->class . ")";
122 # ABSTRACT: Class/TypeConstraint parallel hierarchy
130 This class represents type constraints for a class.
134 C<Moose::Meta::TypeConstraint::Class> is a subclass of
135 L<Moose::Meta::TypeConstraint>.
141 =item B<< Moose::Meta::TypeConstraint::Class->new(%options) >>
143 This creates a new class type constraint based on the given
146 It takes the same options as its parent, with two exceptions. First,
147 it requires an additional option, C<class>, which is name of the
148 constraint's class. Second, it automatically sets the parent to the
151 The constructor also overrides the hand optimized type constraint with
152 one it creates internally.
154 =item B<< $constraint->class >>
156 Returns the class name associated with the constraint.
158 =item B<< $constraint->parents >>
160 Returns all the type's parent types, corresponding to its parent
163 =item B<< $constraint->is_subtype_of($type_name_or_object) >>
165 If the given type is also a class type, then this checks that the
166 type's class is a subclass of the other type's class.
168 Otherwise it falls back to the implementation in
169 L<Moose::Meta::TypeConstraint>.
171 =item B<< $constraint->create_child_type(%options) >>
173 This returns a new L<Moose::Meta::TypeConstraint> object with the type
176 Note that it does I<not> return a
177 C<Moose::Meta::TypeConstraint::Class> object!
179 =item B<< $constraint->get_message($value) >>
181 This is the same as L<Moose::Meta::TypeConstraint/get_message> except
182 that it explicitly says C<isa> was checked. This is to help users deal
183 with accidentally autovivified type constraints.
189 See L<Moose/BUGS> for details on reporting bugs.