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f5d08022 |
1 | package Class::MOP::Class::Immutable::Trait; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
6 | use MRO::Compat; |
7 | |
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8 | use Carp 'confess'; |
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9 | use Scalar::Util 'blessed', 'weaken'; |
10 | |
11 | sub meta { |
12 | my $self = shift; |
13 | |
14 | # if it is not blessed, then someone is asking |
15 | # for the meta of Class::MOP::Class:;Immutable::Trait |
16 | return Class::MOP::Class->initialize($self) unless blessed($self); |
17 | |
18 | # otherwise, they are asking for the metaclass |
19 | # which has been made immutable, which is itself |
20 | # except in the cases where it is a metaclass itself |
21 | # that has been made immutable and for that we need |
22 | # to dig a bit ... |
23 | |
24 | if ( $self->isa('Class::MOP::Class') ) { |
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25 | |
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26 | # except this is a lie... oh well |
27 | return Class::MOP::class_of( $self->get_mutable_metaclass_name ); |
28 | } |
29 | else { |
30 | return $self; |
31 | } |
32 | } |
33 | |
34 | # the original class of the metaclass instance |
35 | sub get_mutable_metaclass_name { $_[0]{__immutable}{original_class} } |
36 | |
37 | sub immutable_options { %{ $_[0]{__immutable}{options} } } |
38 | |
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39 | sub is_mutable {0} |
40 | sub is_immutable {1} |
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41 | |
42 | sub superclasses { |
43 | confess "This method is read-only" if @_ > 1; |
44 | $_[0]->next::method; |
45 | } |
46 | |
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47 | sub _immutable_cannot_call { |
48 | Carp::confess "This method cannot be called on an immutable instance"; |
49 | } |
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50 | |
51 | sub add_method { shift->_immutable_cannot_call } |
52 | sub alias_method { shift->_immutable_cannot_call } |
53 | sub remove_method { shift->_immutable_cannot_call } |
54 | sub add_attribute { shift->_immutable_cannot_call } |
55 | sub remove_attribute { shift->_immutable_cannot_call } |
56 | sub remove_package_symbol { shift->_immutable_cannot_call } |
57 | |
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58 | sub class_precedence_list { |
59 | @{ $_[0]{__immutable}{class_precedence_list} |
60 | ||= [ shift->next::method ] }; |
61 | } |
62 | |
63 | sub linearized_isa { |
64 | @{ $_[0]{__immutable}{linearized_isa} ||= [ shift->next::method ] }; |
65 | } |
66 | |
67 | sub get_all_methods { |
68 | @{ $_[0]{__immutable}{get_all_methods} ||= [ shift->next::method ] }; |
69 | } |
70 | |
71 | sub get_all_method_names { |
72 | @{ $_[0]{__immutable}{get_all_method_names} ||= [ shift->next::method ] }; |
73 | } |
74 | |
75 | sub get_all_attributes { |
76 | @{ $_[0]{__immutable}{get_all_attributes} ||= [ shift->next::method ] }; |
77 | } |
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78 | |
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79 | sub get_meta_instance { |
80 | $_[0]{__immutable}{get_meta_instance} ||= shift->next::method; |
81 | } |
82 | |
83 | sub get_method_map { |
84 | $_[0]{__immutable}{get_method_map} ||= shift->next::method; |
85 | } |
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86 | |
87 | sub add_package_symbol { |
88 | confess "Cannot add package symbols to an immutable metaclass" |
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89 | unless ( caller(1) )[3] eq 'Class::MOP::Package::get_package_symbol'; |
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90 | |
91 | shift->next::method(@_); |
92 | } |
93 | |
94 | 1; |