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package metaclass; our $VERSION = '2.2203'; use strict; use warnings; use Module::Runtime 'use_package_optimistically', 'use_module'; use Class::MOP; sub import { my ( $class, @args ) = @_; unshift @args, "metaclass" if @args % 2 == 1; my %options = @args; my $meta_name = exists $options{meta_name} ? $options{meta_name} : 'meta'; my $metaclass = delete $options{metaclass}; unless ( defined $metaclass ) { $metaclass = "Class::MOP::Class"; } else { use_package_optimistically($metaclass); } ($metaclass->isa('Class::MOP::Class')) || die use_module('Moose::Exception::MetaclassMustBeDerivedFromClassMOPClass')->new( class_name => $metaclass ); # make sure the custom metaclasses get loaded foreach my $key (grep { /_(?:meta)?class$/ } keys %options) { unless ( ref( my $class = $options{$key} ) ) { use_package_optimistically($class) } } my $package = caller(); # create a meta object so we can install &meta my $meta = $metaclass->initialize($package => %options); $meta->_add_meta_method($meta_name) if defined $meta_name; } 1; # ABSTRACT: a pragma for installing and using Class::MOP metaclasses __END__ =pod =encoding UTF-8 =head1 NAME metaclass - a pragma for installing and using Class::MOP metaclasses =head1 VERSION version 2.2203 =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', ); # if we'd rather not install a 'meta' method, we can do this use metaclass meta_name => undef; # or if we'd like it to have a different name, use metaclass meta_name => 'my_meta'; =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, unless C<undef> is passed to the C<meta_name> option. Note that if you are using Moose, you most likely do B<not> want to be using this - look into L<Moose::Util::MetaRole> instead. =head1 AUTHORS =over 4 =item * Stevan Little <stevan@cpan.org> =item * Dave Rolsky <autarch@urth.org> =item * Jesse Luehrs <doy@cpan.org> =item * Shawn M Moore <sartak@cpan.org> =item * יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org> =item * Karen Etheridge <ether@cpan.org> =item * Florian Ragwitz <rafl@debian.org> =item * Hans Dieter Pearcey <hdp@cpan.org> =item * Chris Prather <chris@prather.org> =item * Matt S Trout <mstrout@cpan.org> =back =head1 COPYRIGHT AND LICENSE This software is copyright (c) 2006 by Infinity Interactive, Inc. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. =cut