8 use Scalar::Util 'blessed';
14 my ( $class, @args ) = @_;
16 unshift @args, "metaclass" if @args % 2 == 1;
19 my $meta_name = exists $options{meta_name} ? $options{meta_name} : 'meta';
20 my $metaclass = delete $options{metaclass};
22 unless ( defined $metaclass ) {
23 $metaclass = "Class::MOP::Class";
25 Class::MOP::load_class($metaclass);
28 ($metaclass->isa('Class::MOP::Class'))
29 || confess "The metaclass ($metaclass) must be derived from Class::MOP::Class";
31 # make sure the custom metaclasses get loaded
32 foreach my $key (grep { /_(?:meta)?class$/ } keys %options) {
33 unless ( ref( my $class = $options{$key} ) ) {
34 Class::MOP::load_class($class)
38 my $package = caller();
40 # create a meta object so we can install &meta
41 my $meta = $metaclass->initialize($package => %options);
42 $meta->_add_meta_method($meta_name)
43 if defined $meta_name;
48 # ABSTRACT: a pragma for installing and using Class::MOP metaclasses
58 # use Class::MOP::Class
61 # ... or use a custom metaclass
62 use metaclass 'MyMetaClass';
64 # ... or use a custom metaclass
65 # and custom attribute and method
67 use metaclass 'MyMetaClass' => (
68 'attribute_metaclass' => 'MyAttributeMetaClass',
69 'method_metaclass' => 'MyMethodMetaClass',
72 # ... or just specify custom attribute
73 # and method classes, and Class::MOP::Class
74 # is the assumed metaclass
76 'attribute_metaclass' => 'MyAttributeMetaClass',
77 'method_metaclass' => 'MyMethodMetaClass',
80 # if we'd rather not install a 'meta' method, we can do this
81 use metaclass meta_name => undef;
82 # or if we'd like it to have a different name,
83 use metaclass meta_name => 'my_meta';
87 This is a pragma to make it easier to use a specific metaclass
88 and a set of custom attribute and method metaclasses. It also
89 installs a C<meta> method to your class as well, unless C<undef>
90 is passed to the C<meta_name> option.
92 Note that if you are using Moose, you most likely do B<not> want
93 to be using this - look into L<Moose::Util::MetaRole> instead.