Commit | Line | Data |
677eb158 |
1 | |
2 | package metaclass; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
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7 | use Carp 'confess'; |
8 | use Scalar::Util 'blessed'; |
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9 | |
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10 | our $VERSION = '0.04'; |
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11 | our $AUTHORITY = 'cpan:STEVAN'; |
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12 | |
13 | use Class::MOP; |
14 | |
15 | sub import { |
16 | shift; |
1becdfcc |
17 | my $metaclass; |
c23184fc |
18 | if (!defined($_[0]) || $_[0] =~ /^(attribute|method|instance)_metaclass/) { |
1becdfcc |
19 | $metaclass = 'Class::MOP::Class'; |
20 | } |
21 | else { |
22 | $metaclass = shift; |
f2266181 |
23 | #make sure the custom metaclass gets loaded |
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24 | Class::MOP::load_class($metaclass); |
1becdfcc |
25 | ($metaclass->isa('Class::MOP::Class')) |
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26 | || confess "The metaclass ($metaclass) must be derived from Class::MOP::Class"; |
1becdfcc |
27 | } |
d82060fe |
28 | my %options = @_; |
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29 | #make sure the custom metaclasses get loaded |
30 | map{ Class::MOP::load_class($options{$_}) } |
31 | grep{ /^(attribute|method|instance)_metaclass/ } keys %options; |
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32 | my $package = caller(); |
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33 | |
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34 | # create a meta object so we can install &meta |
35 | my $meta = $metaclass->initialize($package => %options); |
36 | $meta->add_method('meta' => sub { |
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37 | # we must re-initialize so that it |
38 | # works as expected in subclasses, |
39 | # since metaclass instances are |
40 | # singletons, this is not really a |
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41 | # big deal anyway. |
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42 | $metaclass->initialize((blessed($_[0]) || $_[0]) => %options) |
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43 | }); |
44 | } |
45 | |
46 | 1; |
47 | |
48 | __END__ |
49 | |
50 | =pod |
51 | |
52 | =head1 NAME |
53 | |
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54 | metaclass - a pragma for installing and using Class::MOP metaclasses |
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55 | |
56 | =head1 SYNOPSIS |
57 | |
550d56db |
58 | package MyClass; |
59 | |
60 | # use Class::MOP::Class |
95514cb4 |
61 | use metaclass; |
550d56db |
62 | |
63 | # ... or use a custom metaclass |
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64 | use metaclass 'MyMetaClass'; |
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65 | |
66 | # ... or use a custom metaclass |
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67 | # and custom attribute and method |
68 | # metaclasses |
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69 | use metaclass 'MyMetaClass' => ( |
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70 | 'attribute_metaclass' => 'MyAttributeMetaClass', |
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71 | 'method_metaclass' => 'MyMethodMetaClass', |
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72 | ); |
73 | |
1becdfcc |
74 | # ... or just specify custom attribute |
75 | # and method classes, and Class::MOP::Class |
76 | # is the assumed metaclass |
77 | use metaclass ( |
c23184fc |
78 | 'attribute_metaclass' => 'MyAttributeMetaClass', |
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79 | 'method_metaclass' => 'MyMethodMetaClass', |
1becdfcc |
80 | ); |
81 | |
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82 | =head1 DESCRIPTION |
83 | |
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84 | This is a pragma to make it easier to use a specific metaclass |
85 | and a set of custom attribute and method metaclasses. It also |
86 | installs a C<meta> method to your class as well. |
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87 | |
1a09d9cc |
88 | =head1 AUTHORS |
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89 | |
90 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
91 | |
92 | =head1 COPYRIGHT AND LICENSE |
93 | |
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94 | Copyright 2006-2008 by Infinity Interactive, Inc. |
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95 | |
96 | L<http://www.iinteractive.com> |
97 | |
98 | This library is free software; you can redistribute it and/or modify |
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99 | it under the same terms as Perl itself. |
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100 | |
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101 | =cut |