2 package Moose::Meta::Method::Destructor;
7 use Devel::GlobalDestruction ();
8 use Scalar::Util 'blessed', 'weaken';
11 use base 'Moose::Meta::Method',
12 'Class::MOP::Method::Inlined';
18 (ref $options{options} eq 'HASH')
19 || $class->throw_error("You must pass a hash of options", data => $options{options});
21 ($options{package_name} && $options{name})
22 || $class->throw_error("You must supply the package_name and name parameters $Class::MOP::Method::UPGRADE_ERROR_TEXT");
27 'package_name' => $options{package_name},
28 'name' => $options{name},
30 'options' => $options{options},
31 'associated_metaclass' => $options{metaclass},
34 # we don't want this creating
35 # a cycle in the code, if not
37 weaken($self->{'associated_metaclass'});
39 $self->_initialize_body;
46 sub options { (shift)->{'options'} }
52 my $metaclass = shift;
54 ( blessed $metaclass && $metaclass->isa('Class::MOP::Class') )
55 || $self->throw_error(
56 "The is_needed method expected a metaclass object as its arugment");
58 return $metaclass->find_method_by_name("DEMOLISHALL");
62 Carp::cluck('The initialize_body method has been made private.'
63 . " The public version is deprecated and will be removed in a future release.\n");
64 shift->_initialize_body;
67 sub _initialize_body {
70 # the %options should also include a both
71 # a call 'initializer' and call 'SUPER::'
72 # options, which should cover approx 90%
73 # of the possible use cases (even if it
74 # requires some adaption on the part of
75 # the author, after all, nothing is free)
77 my $class = $self->associated_metaclass->name;
81 'return ' . $self->_generate_fallback_destructor('$self'),
82 'if Scalar::Util::blessed($self) ne \'' . $class . '\';',
84 $self->_generate_DEMOLISHALL('$self'),
88 warn join("\n", @source) if $self->options->{debug};
91 $self->_compile_code(source => \@source);
94 my $source = join("\n", @source);
96 "Could not eval the destructor :\n\n$source\n\nbecause :\n\n$_",
102 $self->{'body'} = $code;
105 sub _generate_fallback_destructor {
109 return $inv . '->Moose::Object::DESTROY(@_)';
112 sub _generate_DEMOLISHALL {
116 my @methods = $self->associated_metaclass->find_all_methods_by_name('DEMOLISH');
117 return unless @methods;
120 'my $igd = Devel::GlobalDestruction::in_global_destruction;',
122 (map { $inv . '->' . $_->{class} . '::DEMOLISH($igd);' } @methods),
124 'Try::Tiny::catch {',
133 # ABSTRACT: Method Meta Object for destructors
141 This class is a subclass of L<Class::MOP::Class::Generated> that
142 provides Moose-specific functionality for inlining destructors.
144 To understand this class, you should read the the
145 L<Class::MOP::Class::Generated> documentation as well.
149 C<Moose::Meta::Method::Destructor> is a subclass of
150 L<Moose::Meta::Method> I<and> L<Class::MOP::Method::Generated>.
156 =item B<< Moose::Meta::Method::Destructor->new(%options) >>
158 This constructs a new object. It accepts the following options:
164 The package for the class in which the destructor is being
165 inlined. This option is required.
169 The name of the destructor method. This option is required.
173 The metaclass for the class this destructor belongs to. This is
174 optional, as it can be set later by calling C<<
175 $metamethod->attach_to_class >>.
179 =item B<< Moose::Meta;:Method::Destructor->is_needed($metaclass) >>
181 Given a L<Moose::Meta::Class> object, this method returns a boolean
182 indicating whether the class needs a destructor. If the class or any
183 of its parents defines a C<DEMOLISH> method, it needs a destructor.
189 See L<Moose/BUGS> for details on reporting bugs.