use warnings;
use metaclass;
-use Scalar::Util qw(blessed);
+use Scalar::Util 'blessed';
+use Moose::Util::TypeConstraints ();
+
+our $VERSION = '0.93';
+$VERSION = eval $VERSION;
+our $AUTHORITY = 'cpan:STEVAN';
use base 'Moose::Meta::TypeConstraint';
-use Moose::Util::TypeConstraints ();
+__PACKAGE__->meta->add_attribute('class' => (
+ reader => 'class',
+));
sub new {
- my $class = shift;
- my $self = $class->meta->new_object(@_, parent => Moose::Util::TypeConstraints::find_type_constraint('Object') );
- $self->compile_type_constraint()
- unless $self->_has_compiled_type_constraint;
+ my ( $class, %args ) = @_;
+
+ $args{parent} = Moose::Util::TypeConstraints::find_type_constraint('Object');
+ my $self = $class->_new(\%args);
+
+ $self->_create_hand_optimized_type_constraint;
+ $self->compile_type_constraint();
+
return $self;
}
+sub _create_hand_optimized_type_constraint {
+ my $self = shift;
+ my $class = $self->class;
+ $self->hand_optimized_type_constraint(
+ sub {
+ blessed( $_[0] ) && $_[0]->isa($class)
+ }
+ );
+}
+
sub parents {
my $self = shift;
return (
$self->parent,
- map { Moose::Util::TypeConstraints::find_type_constraint($_) } $self->name->meta->superclasses,
+ map {
+ # FIXME find_type_constraint might find a TC named after the class but that isn't really it
+ # I did this anyway since it's a convention that preceded TypeConstraint::Class, and it should DWIM
+ # if anybody thinks this problematic please discuss on IRC.
+ # a possible fix is to add by attr indexing to the type registry to find types of a certain property
+ # regardless of their name
+ Moose::Util::TypeConstraints::find_type_constraint($_)
+ ||
+ __PACKAGE__->new( class => $_, name => "__ANON__" )
+ } Class::MOP::class_of($self->class)->superclasses,
);
}
-sub hand_optimized_type_constraint {
- my $self = shift;
- my $class = $self->name;
- sub { blessed( $_[0] ) && $_[0]->isa($class) }
-}
+sub equals {
+ my ( $self, $type_or_name ) = @_;
-sub has_hand_optimized_type_constraint { 1 }
+ my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
+
+ return unless defined $other;
+ return unless $other->isa(__PACKAGE__);
+
+ return $self->class eq $other->class;
+}
sub is_a_type_of {
- my ($self, $type_name) = @_;
+ my ($self, $type_or_name) = @_;
- return $self->name eq $type_name || $self->is_subtype_of($type_name);
+ my $type = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
+
+ ($self->equals($type) || $self->is_subtype_of($type_or_name));
}
sub is_subtype_of {
- my ($self, $type_name) = @_;
+ my ($self, $type_or_name_or_class ) = @_;
+
+ if ( not ref $type_or_name_or_class ) {
+ # it might be a class
+ return 1 if $self->class->isa( $type_or_name_or_class );
+ }
+
+ 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
+ # or it could also just be a type object in this branch
+ return $self->class->isa( $type->class );
+ } else {
+ # the only other thing we are a subtype of is Object
+ $self->SUPER::is_subtype_of($type);
+ }
+}
+
+# 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);
+}
+
+sub get_message {
+ my $self = shift;
+ my ($value) = @_;
+
+ if ($self->has_message) {
+ return $self->SUPER::get_message(@_);
+ }
- return 1 if $type_name eq 'Object';
- return $self->name->isa( $type_name );
+ $value = (defined $value ? overload::StrVal($value) : 'undef');
+ return "Validation failed for '" . $self->name . "' failed with value $value (not isa " . $self->class . ")";
}
1;
__END__
+
=pod
=head1 NAME
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 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 >>
+
+Returns the class name associated with the constraint.
-=item hand_optimized_type_constraint
+=item B<< $constraint->parents >>
-=item has_hand_optimized_type_constraint
+Returns all the type's parent types, corresponding to its parent
+classes.
-=item is_a_type_of
+=item B<< $constraint->is_subtype_of($type_name_or_object) >>
-=item is_subtype_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 parents
+Otherwise it falls back to the implementation in
+L<Moose::Meta::TypeConstraint>.
-Return all the parent types, corresponding to the parent classes.
+=item B<< $constraint->create_child_type(%options) >>
+
+This returns a new L<Moose::Meta::TypeConstraint> object with the type
+as its parent.
+
+Note that it does I<not> return a
+C<Moose::Meta::TypeConstraint::Class> object!
+
+=item B<< $constraint->get_message($value) >>
+
+This is the same as L<Moose::Meta::TypeConstraint/get_message> except
+that it explicitly says C<isa> was checked. This is to help users deal
+with accidentally autovivified type constraints.
=back
+=head1 BUGS
+
+All complex software has bugs lurking in it, and this module is no
+exception. If you find a bug please either email me, or add the bug
+to cpan-RT.
+
+=head1 AUTHOR
+
+Yuval Kogman E<lt>nothingmuch@cpan.orgE<gt>
+
+=head1 COPYRIGHT AND LICENSE
+
+Copyright 2006-2009 by Infinity Interactive, Inc.
+
+L<http://www.iinteractive.com>
+
+This library is free software; you can redistribute it and/or modify
+it under the same terms as Perl itself.
+
=cut
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