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package metaclass;
use strict;
use warnings;
use Carp 'confess';
use Scalar::Util 'blessed';
our $VERSION = '0.03';
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 {
$metaclass = shift;
($metaclass->isa('Class::MOP::Class'))
|| confess "The metaclass ($metaclass) must be derived from Class::MOP::Class";
}
my %options = @_;
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>
Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright 2006 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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