Commit | Line | Data |
acf10771 |
1 | |
2 | package Moose::Meta::Method::Destructor; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
acf10771 |
7 | use Scalar::Util 'blessed', 'weaken'; |
8 | |
4b2189ce |
9 | our $VERSION = '0.72'; |
e606ae5f |
10 | $VERSION = eval $VERSION; |
acf10771 |
11 | our $AUTHORITY = 'cpan:STEVAN'; |
12 | |
badb7e89 |
13 | use base 'Moose::Meta::Method', |
14 | 'Class::MOP::Method::Generated'; |
acf10771 |
15 | |
16 | sub new { |
17 | my $class = shift; |
18 | my %options = @_; |
19 | |
46cb090f |
20 | (ref $options{options} eq 'HASH') |
21 | || $class->throw_error("You must pass a hash of options", data => $options{options}); |
22 | |
1b2aea39 |
23 | ($options{package_name} && $options{name}) |
46cb090f |
24 | || $class->throw_error("You must supply the package_name and name parameters $Class::MOP::Method::UPGRADE_ERROR_TEXT"); |
25 | |
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26 | my $self = bless { |
27 | # from our superclass |
e606ae5f |
28 | 'body' => undef, |
29 | 'package_name' => $options{package_name}, |
30 | 'name' => $options{name}, |
acf10771 |
31 | # ... |
e606ae5f |
32 | 'options' => $options{options}, |
33 | 'associated_metaclass' => $options{metaclass}, |
acf10771 |
34 | } => $class; |
35 | |
36 | # we don't want this creating |
37 | # a cycle in the code, if not |
38 | # needed |
e606ae5f |
39 | weaken($self->{'associated_metaclass'}); |
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40 | |
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41 | $self->initialize_body; |
acf10771 |
42 | |
43 | return $self; |
44 | } |
45 | |
46 | ## accessors |
47 | |
e606ae5f |
48 | sub options { (shift)->{'options'} } |
49 | sub associated_metaclass { (shift)->{'associated_metaclass'} } |
acf10771 |
50 | |
51 | ## method |
52 | |
a7b097bb |
53 | sub is_needed { |
54 | my $self = shift; |
55 | my $metaclass = shift; |
56 | |
57 | ( blessed $metaclass && $metaclass->isa('Class::MOP::Class') ) |
58 | || $self->throw_error( |
59 | "The is_needed method expected a metaclass object as its arugment"); |
60 | |
61 | return $metaclass->meta->can('DEMOLISH'); |
9d22affb |
62 | } |
acf10771 |
63 | |
415e6f85 |
64 | sub initialize_body { |
acf10771 |
65 | my $self = shift; |
66 | # TODO: |
67 | # the %options should also include a both |
68 | # a call 'initializer' and call 'SUPER::' |
69 | # options, which should cover approx 90% |
70 | # of the possible use cases (even if it |
71 | # requires some adaption on the part of |
72 | # the author, after all, nothing is free) |
9d22affb |
73 | |
74 | my @DEMOLISH_methods = $self->associated_metaclass->find_all_methods_by_name('DEMOLISH'); |
75 | |
76 | return unless @DEMOLISH_methods; |
77 | |
acf10771 |
78 | my $source = 'sub {'; |
79 | |
80 | my @DEMOLISH_calls; |
9d22affb |
81 | foreach my $method (@DEMOLISH_methods) { |
acf10771 |
82 | push @DEMOLISH_calls => '$_[0]->' . $method->{class} . '::DEMOLISH()'; |
83 | } |
84 | |
5431d21a |
85 | $source .= join ";\n" => @DEMOLISH_calls; |
acf10771 |
86 | |
87 | $source .= ";\n" . '}'; |
88 | warn $source if $self->options->{debug}; |
89 | |
497442e8 |
90 | my $code = $self->_compile_code( |
91 | environment => {}, |
92 | code => $source, |
93 | ) or $self->throw_error("Could not eval the destructor :\n\n$source\n\nbecause :\n\n$@", error => $@, data => $source); |
94 | |
e606ae5f |
95 | $self->{'body'} = $code; |
acf10771 |
96 | } |
97 | |
98 | |
99 | 1; |
100 | |
101 | __END__ |
102 | |
103 | =pod |
104 | |
587ae0d2 |
105 | =head1 NAME |
106 | |
107 | Moose::Meta::Method::Destructor - Method Meta Object for destructors |
108 | |
587ae0d2 |
109 | =head1 DESCRIPTION |
110 | |
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111 | This is a subclass of L<Class::MOP::Method> which handles |
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112 | constructing an appropriate Destructor method. This is primarily |
d44714be |
113 | used in the making of immutable metaclasses, otherwise it is |
114 | not particularly useful. |
115 | |
587ae0d2 |
116 | =head1 METHODS |
117 | |
118 | =over 4 |
119 | |
120 | =item B<new> |
121 | |
122 | =item B<attributes> |
123 | |
124 | =item B<meta_instance> |
125 | |
126 | =item B<options> |
127 | |
128 | =item B<is_needed> |
129 | |
415e6f85 |
130 | =item B<initialize_body> |
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131 | |
132 | =item B<associated_metaclass> |
133 | |
134 | =back |
135 | |
136 | =head1 AUTHORS |
137 | |
138 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
139 | |
140 | =head1 COPYRIGHT AND LICENSE |
141 | |
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142 | Copyright 2006-2009 by Infinity Interactive, Inc. |
587ae0d2 |
143 | |
144 | L<http://www.iinteractive.com> |
145 | |
146 | This library is free software; you can redistribute it and/or modify |
147 | it under the same terms as Perl itself. |
148 | |
149 | =cut |
150 | |