1 package Moose::Meta::TypeConstraint::Class;
8 use Scalar::Util 'blessed';
9 use Moose::Util::TypeConstraints ();
11 use base 'Moose::Meta::TypeConstraint';
13 __PACKAGE__->meta->add_attribute('class' => (
21 return 'Scalar::Util::blessed(' . $val . ')'
22 . ' && ' . $val . '->isa(' . B::perlstring($self->class) . ')';
26 my ( $class, %args ) = @_;
29 = Moose::Util::TypeConstraints::find_type_constraint('Object');
31 my $class_name = $args{class};
32 $args{constraint} = sub { $_[0]->isa($class_name) };
34 $args{inlined} = $inliner;
36 my $self = $class->_new( \%args );
38 $self->compile_type_constraint();
48 # FIXME find_type_constraint might find a TC named after the class but that isn't really it
49 # I did this anyway since it's a convention that preceded TypeConstraint::Class, and it should DWIM
50 # if anybody thinks this problematic please discuss on IRC.
51 # a possible fix is to add by attr indexing to the type registry to find types of a certain property
52 # regardless of their name
53 Moose::Util::TypeConstraints::find_type_constraint($_)
55 __PACKAGE__->new( class => $_, name => "__ANON__" )
56 } Class::MOP::class_of($self->class)->superclasses,
61 my ( $self, $type_or_name ) = @_;
63 my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
65 return unless defined $other;
66 return unless $other->isa(__PACKAGE__);
68 return $self->class eq $other->class;
72 my ($self, $type_or_name) = @_;
74 my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
76 ($self->equals($type) || $self->is_subtype_of($type_or_name));
80 my ($self, $type_or_name_or_class ) = @_;
82 my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name_or_class);
84 if ( not defined $type ) {
85 if ( not ref $type_or_name_or_class ) {
87 return 1 if $self->class->isa( $type_or_name_or_class );
92 if ( $type->isa(__PACKAGE__) && $type->class ne $self->class) {
93 # if $type_or_name_or_class isn't a class, it might be the TC name of another ::Class type
94 # or it could also just be a type object in this branch
95 return $self->class->isa( $type->class );
97 # the only other thing we are a subtype of is Object
98 $self->SUPER::is_subtype_of($type);
102 # This is a bit counter-intuitive, but a child type of a Class type
103 # constraint is not itself a Class type constraint (it has no class
104 # attribute). This whole create_child_type thing needs some changing
105 # though, probably making MMC->new a factory or something.
106 sub create_child_type {
107 my ($self, @args) = @_;
108 return Moose::Meta::TypeConstraint->new(@args, parent => $self);
115 if ($self->has_message) {
116 return $self->SUPER::get_message(@_);
119 $value = (defined $value ? overload::StrVal($value) : 'undef');
120 return "Validation failed for '" . $self->name . "' with value $value (not isa " . $self->class . ")";
125 # ABSTRACT: Class/TypeConstraint parallel hierarchy
133 This class represents type constraints for a class.
137 C<Moose::Meta::TypeConstraint::Class> is a subclass of
138 L<Moose::Meta::TypeConstraint>.
144 =item B<< Moose::Meta::TypeConstraint::Class->new(%options) >>
146 This creates a new class type constraint based on the given
149 It takes the same options as its parent, with two exceptions. First,
150 it requires an additional option, C<class>, which is name of the
151 constraint's class. Second, it automatically sets the parent to the
154 The constructor also overrides the hand optimized type constraint with
155 one it creates internally.
157 =item B<< $constraint->class >>
159 Returns the class name associated with the constraint.
161 =item B<< $constraint->parents >>
163 Returns all the type's parent types, corresponding to its parent
166 =item B<< $constraint->is_subtype_of($type_name_or_object) >>
168 If the given type is also a class type, then this checks that the
169 type's class is a subclass of the other type's class.
171 Otherwise it falls back to the implementation in
172 L<Moose::Meta::TypeConstraint>.
174 =item B<< $constraint->create_child_type(%options) >>
176 This returns a new L<Moose::Meta::TypeConstraint> object with the type
179 Note that it does I<not> return a
180 C<Moose::Meta::TypeConstraint::Class> object!
182 =item B<< $constraint->get_message($value) >>
184 This is the same as L<Moose::Meta::TypeConstraint/get_message> except
185 that it explicitly says C<isa> was checked. This is to help users deal
186 with accidentally autovivified type constraints.
192 See L<Moose/BUGS> for details on reporting bugs.