package metaclass; use strict; use warnings; use Carp 'confess'; use Scalar::Util 'blessed'; our $VERSION = '0.05'; our $AUTHORITY = 'cpan:STEVAN'; use Class::MOP; sub import { shift; my $metaclass; if (!defined($_[0]) || $_[0] =~ /^(attribute|method|instance)_metaclass/) { $metaclass = 'Class::MOP::Class'; } else { $metaclass = shift; #make sure the custom metaclass gets loaded Class::MOP::load_class($metaclass); ($metaclass->isa('Class::MOP::Class')) || confess "The metaclass ($metaclass) must be derived from Class::MOP::Class"; } my %options = @_; # make sure the custom metaclasses get loaded foreach my $class (grep { /^(attribute|method|instance)_metaclass/ } keys %options) { Class::MOP::load_class($options{$class}) } my $package = caller(); # create a meta object so we can install &meta my $meta = $metaclass->initialize($package => %options); $meta->add_method('meta' => sub { # we must re-initialize so that it # works as expected in subclasses, # since metaclass instances are # singletons, this is not really a # big deal anyway. $metaclass->initialize((blessed($_[0]) || $_[0]) => %options) }); } 1; __END__ =pod =head1 NAME metaclass - a pragma for installing and using Class::MOP metaclasses =head1 SYNOPSIS package MyClass; # use Class::MOP::Class use metaclass; # ... or use a custom metaclass use metaclass 'MyMetaClass'; # ... or use a custom metaclass # and custom attribute and method # metaclasses use metaclass 'MyMetaClass' => ( 'attribute_metaclass' => 'MyAttributeMetaClass', 'method_metaclass' => 'MyMethodMetaClass', ); # ... or just specify custom attribute # and method classes, and Class::MOP::Class # is the assumed metaclass use metaclass ( 'attribute_metaclass' => 'MyAttributeMetaClass', 'method_metaclass' => 'MyMethodMetaClass', ); =head1 DESCRIPTION This is a pragma to make it easier to use a specific metaclass and a set of custom attribute and method metaclasses. It also installs a C<meta> method to your class as well. =head1 AUTHORS Stevan Little E<lt>stevan@iinteractive.comE<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