Add SUPER to list of modules for development
[gitmo/Moose.git] / lib / metaclass.pm
CommitLineData
38bf2a25 1
2package metaclass;
3
4use strict;
5use warnings;
6
7use Carp 'confess';
b5ae7c00 8use Class::Load 'load_class';
38bf2a25 9use Scalar::Util 'blessed';
10use Try::Tiny;
11
38bf2a25 12use Class::MOP;
13
14sub import {
15 my ( $class, @args ) = @_;
16
17 unshift @args, "metaclass" if @args % 2 == 1;
18 my %options = @args;
19
20 my $meta_name = exists $options{meta_name} ? $options{meta_name} : 'meta';
21 my $metaclass = delete $options{metaclass};
22
23 unless ( defined $metaclass ) {
24 $metaclass = "Class::MOP::Class";
25 } else {
b5ae7c00 26 load_class($metaclass);
38bf2a25 27 }
28
29 ($metaclass->isa('Class::MOP::Class'))
30 || confess "The metaclass ($metaclass) must be derived from Class::MOP::Class";
31
32 # make sure the custom metaclasses get loaded
33 foreach my $key (grep { /_(?:meta)?class$/ } keys %options) {
34 unless ( ref( my $class = $options{$key} ) ) {
b5ae7c00 35 load_class($class)
38bf2a25 36 }
37 }
38
39 my $package = caller();
40
41 # create a meta object so we can install &meta
42 my $meta = $metaclass->initialize($package => %options);
43 $meta->_add_meta_method($meta_name)
44 if defined $meta_name;
45}
46
471;
48
49# ABSTRACT: a pragma for installing and using Class::MOP metaclasses
50
51__END__
52
53=pod
54
55=head1 SYNOPSIS
56
57 package MyClass;
58
59 # use Class::MOP::Class
60 use metaclass;
61
62 # ... or use a custom metaclass
63 use metaclass 'MyMetaClass';
64
65 # ... or use a custom metaclass
66 # and custom attribute and method
67 # metaclasses
68 use metaclass 'MyMetaClass' => (
69 'attribute_metaclass' => 'MyAttributeMetaClass',
70 'method_metaclass' => 'MyMethodMetaClass',
71 );
72
73 # ... or just specify custom attribute
74 # and method classes, and Class::MOP::Class
75 # is the assumed metaclass
76 use metaclass (
77 'attribute_metaclass' => 'MyAttributeMetaClass',
78 'method_metaclass' => 'MyMethodMetaClass',
79 );
80
81 # if we'd rather not install a 'meta' method, we can do this
82 use metaclass meta_name => undef;
83 # or if we'd like it to have a different name,
84 use metaclass meta_name => 'my_meta';
85
86=head1 DESCRIPTION
87
88This is a pragma to make it easier to use a specific metaclass
89and a set of custom attribute and method metaclasses. It also
90installs a C<meta> method to your class as well, unless C<undef>
91is passed to the C<meta_name> option.
92
b5d324aa 93Note that if you are using Moose, you most likely do B<not> want
94to be using this - look into L<Moose::Util::MetaRole> instead.
95
38bf2a25 96=cut