2 package Moose::Meta::Method::Destructor;
7 use Scalar::Util 'blessed', 'weaken';
10 $VERSION = eval $VERSION;
11 our $AUTHORITY = 'cpan:STEVAN';
13 use base 'Moose::Meta::Method',
14 'Class::MOP::Method::Generated';
20 (ref $options{options} eq 'HASH')
21 || $class->throw_error("You must pass a hash of options", data => $options{options});
23 ($options{package_name} && $options{name})
24 || $class->throw_error("You must supply the package_name and name parameters $Class::MOP::Method::UPGRADE_ERROR_TEXT");
29 'package_name' => $options{package_name},
30 'name' => $options{name},
32 'options' => $options{options},
33 'associated_metaclass' => $options{metaclass},
36 # we don't want this creating
37 # a cycle in the code, if not
39 weaken($self->{'associated_metaclass'});
41 $self->_initialize_body;
48 sub options { (shift)->{'options'} }
54 my $metaclass = shift;
56 ( blessed $metaclass && $metaclass->isa('Class::MOP::Class') )
57 || $self->throw_error(
58 "The is_needed method expected a metaclass object as its arugment");
60 return $metaclass->find_method_by_name('DEMOLISH');
64 Carp::cluck('The initialize_body method has been made private.'
65 . " The public version is deprecated and will be removed in a future release.\n");
66 shift->_initialize_body;
69 sub _initialize_body {
72 # the %options should also include a both
73 # a call 'initializer' and call 'SUPER::'
74 # options, which should cover approx 90%
75 # of the possible use cases (even if it
76 # requires some adaption on the part of
77 # the author, after all, nothing is free)
79 my @DEMOLISH_methods = $self->associated_metaclass->find_all_methods_by_name('DEMOLISH');
81 return unless @DEMOLISH_methods;
86 foreach my $method (@DEMOLISH_methods) {
87 push @DEMOLISH_calls => '$_[0]->' . $method->{class} . '::DEMOLISH()';
90 $source .= join ";\n" => @DEMOLISH_calls;
92 $source .= ";\n" . '}';
93 warn $source if $self->options->{debug};
95 my $code = $self->_compile_code(
98 ) or $self->throw_error("Could not eval the destructor :\n\n$source\n\nbecause :\n\n$@", error => $@, data => $source);
100 $self->{'body'} = $code;
112 Moose::Meta::Method::Destructor - Method Meta Object for destructors
116 This class is a subclass of L<Class::MOP::Class::Generated> that
117 provides Moose-specific functionality for inlining destructors.
119 To understand this class, you should read the the
120 L<Class::MOP::Class::Generated> documentation as well.
124 C<Moose::Meta::Method::Destructor> is a subclass of
125 L<Moose::Meta::Method> I<and> L<Class::MOP::Method::Generated>.
131 =item B<< Moose::Meta;:Method::Destructor->new(%options) >>
133 This constructs a new object. It accepts the following options:
139 The package for the class in which the destructor is being
140 inlined. This option is required.
144 The name of the destructor method. This option is required.
148 The metaclass for the class this destructor belongs to. This is
149 optional, as it can be set later by calling C<<
150 $metamethod->attach_to_class >>.
154 =item B<< Moose::Meta;:Method::Destructor->is_needed($metaclass) >>
156 Given a L<Moose::Meta::Class> object, this method returns a boolean
157 indicating whether the class needs a destructor. If the class or any
158 of its parents defines a C<DEMOLISH> method, it needs a destructor.
164 Stevan Little E<lt>stevan@iinteractive.comE<gt>
166 =head1 COPYRIGHT AND LICENSE
168 Copyright 2006-2009 by Infinity Interactive, Inc.
170 L<http://www.iinteractive.com>
172 This library is free software; you can redistribute it and/or modify
173 it under the same terms as Perl itself.