Commit | Line | Data |
f5d08022 |
1 | package Class::MOP::Class::Immutable::Trait; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
6 | use MRO::Compat; |
7 | |
6446bd59 |
8 | use Carp 'confess'; |
f5d08022 |
9 | use Scalar::Util 'blessed', 'weaken'; |
10 | |
b7e04496 |
11 | our $VERSION = '0.88'; |
f04900bf |
12 | $VERSION = eval $VERSION; |
13 | our $AUTHORITY = 'cpan:STEVAN'; |
14 | |
f5d08022 |
15 | # the original class of the metaclass instance |
16 | sub get_mutable_metaclass_name { $_[0]{__immutable}{original_class} } |
17 | |
18 | sub immutable_options { %{ $_[0]{__immutable}{options} } } |
19 | |
6446bd59 |
20 | sub is_mutable {0} |
21 | sub is_immutable {1} |
f5d08022 |
22 | |
23 | sub superclasses { |
24 | confess "This method is read-only" if @_ > 1; |
25 | $_[0]->next::method; |
26 | } |
27 | |
6446bd59 |
28 | sub _immutable_cannot_call { |
29 | Carp::confess "This method cannot be called on an immutable instance"; |
30 | } |
f5d08022 |
31 | |
32 | sub add_method { shift->_immutable_cannot_call } |
33 | sub alias_method { shift->_immutable_cannot_call } |
34 | sub remove_method { shift->_immutable_cannot_call } |
35 | sub add_attribute { shift->_immutable_cannot_call } |
36 | sub remove_attribute { shift->_immutable_cannot_call } |
37 | sub remove_package_symbol { shift->_immutable_cannot_call } |
38 | |
6446bd59 |
39 | sub class_precedence_list { |
40 | @{ $_[0]{__immutable}{class_precedence_list} |
41 | ||= [ shift->next::method ] }; |
42 | } |
43 | |
44 | sub linearized_isa { |
45 | @{ $_[0]{__immutable}{linearized_isa} ||= [ shift->next::method ] }; |
46 | } |
47 | |
48 | sub get_all_methods { |
49 | @{ $_[0]{__immutable}{get_all_methods} ||= [ shift->next::method ] }; |
50 | } |
51 | |
52 | sub get_all_method_names { |
53 | @{ $_[0]{__immutable}{get_all_method_names} ||= [ shift->next::method ] }; |
54 | } |
55 | |
56 | sub get_all_attributes { |
57 | @{ $_[0]{__immutable}{get_all_attributes} ||= [ shift->next::method ] }; |
58 | } |
f5d08022 |
59 | |
6446bd59 |
60 | sub get_meta_instance { |
61 | $_[0]{__immutable}{get_meta_instance} ||= shift->next::method; |
62 | } |
63 | |
64 | sub get_method_map { |
65 | $_[0]{__immutable}{get_method_map} ||= shift->next::method; |
66 | } |
f5d08022 |
67 | |
68 | sub add_package_symbol { |
69 | confess "Cannot add package symbols to an immutable metaclass" |
6446bd59 |
70 | unless ( caller(1) )[3] eq 'Class::MOP::Package::get_package_symbol'; |
f5d08022 |
71 | |
72 | shift->next::method(@_); |
73 | } |
74 | |
75 | 1; |
15726b75 |
76 | |
77 | __END__ |
78 | |
79 | =pod |
80 | |
81 | =head1 NAME |
82 | |
83 | Class::MOP::Class::Immutable::Trait - Implements immutability for metaclass objects |
84 | |
85 | =head1 DESCRIPTION |
86 | |
9e25e01f |
87 | This class provides a pseudo-trait that is applied to immutable metaclass |
88 | objects. In reality, it is simply a parent class. |
89 | |
90 | It implements caching and read-only-ness for various metaclass methods. |
15726b75 |
91 | |
92 | =head1 AUTHOR |
93 | |
94 | Yuval Kogman E<lt>nothingmuch@cpan.orgE<gt> |
95 | |
96 | =head1 COPYRIGHT AND LICENSE |
97 | |
98 | Copyright 2009 by Infinity Interactive, Inc. |
99 | |
100 | L<http://www.iinteractive.com> |
101 | |
102 | This library is free software; you can redistribute it and/or modify |
103 | it under the same terms as Perl itself. |
104 | |
105 | =cut |
106 | |