package Moose::Meta::TypeConstraint::Class;
use strict;
use warnings;
use metaclass;
use Scalar::Util 'blessed';
use Moose::Util::TypeConstraints ();
our $VERSION = '0.54';
our $AUTHORITY = 'cpan:STEVAN';
use base 'Moose::Meta::TypeConstraint';
__PACKAGE__->meta->add_attribute('class' => (
reader => 'class',
));
sub new {
my ( $class, %args ) = @_;
$args{parent} = Moose::Util::TypeConstraints::find_type_constraint('Object');
my $self = $class->meta->new_object(%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 (
$self->parent,
map {
# FIXME find_type_constraint might find a TC named after the class but that isn't really it
# I did this anyway since it's a convention that preceded TypeConstraint::Class, and it should DWIM
# if anybody thinks this problematic please discuss on IRC.
# a possible fix is to add by attr indexing to the type registry to find types of a certain property
# regardless of their name
Moose::Util::TypeConstraints::find_type_constraint($_)
||
__PACKAGE__->new( class => $_, name => "__ANON__" )
} $self->class->meta->superclasses,
);
}
sub equals {
my ( $self, $type_or_name ) = @_;
my $other = Moose::Util::TypeConstraints::find_type_constraint($type_or_name);
return unless $other->isa(__PACKAGE__);
return $self->class eq $other->class;
}
sub is_a_type_of {
my ($self, $type_or_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_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);
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);
}
}
1;
__END__
=pod
=head1 NAME
Moose::Meta::TypeConstraint::Class - Class/TypeConstraint parallel hierarchy
=head1 METHODS
=over 4
=item B<new>
=item B<class>
=item B<hand_optimized_type_constraint>
=item B<has_hand_optimized_type_constraint>
=item B<equals>
=item B<is_a_type_of>
=item B<is_subtype_of>
=item B<parents>
Return all the parent types, corresponding to the parent classes.
=item B<meta>
=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 2006-2008 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