2 package Moose::Meta::Method::Destructor;
7 use Devel::GlobalDestruction ();
8 use Scalar::Util 'blessed', 'weaken';
11 our $AUTHORITY = 'cpan:STEVAN';
13 use base 'Moose::Meta::Method',
14 'Class::MOP::Method::Inlined';
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("DEMOLISHALL");
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 $class = $self->associated_metaclass->name;
83 'return ' . $self->_generate_fallback_destructor('$self'),
84 'if Scalar::Util::blessed($self) ne \'' . $class . '\';',
85 $self->_generate_DEMOLISHALL('$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;
121 'my $igd = Devel::GlobalDestruction::in_global_destruction;',
123 (map { $inv . '->' . $_->{class} . '::DEMOLISH($igd);' } @methods),
125 'Try::Tiny::catch {',
126 'no warnings \'misc\';',
136 # ABSTRACT: Method Meta Object for destructors
144 This class is a subclass of L<Class::MOP::Class::Generated> that
145 provides Moose-specific functionality for inlining destructors.
147 To understand this class, you should read the the
148 L<Class::MOP::Class::Generated> documentation as well.
152 C<Moose::Meta::Method::Destructor> is a subclass of
153 L<Moose::Meta::Method> I<and> L<Class::MOP::Method::Generated>.
159 =item B<< Moose::Meta::Method::Destructor->new(%options) >>
161 This constructs a new object. It accepts the following options:
167 The package for the class in which the destructor is being
168 inlined. This option is required.
172 The name of the destructor method. This option is required.
176 The metaclass for the class this destructor belongs to. This is
177 optional, as it can be set later by calling C<<
178 $metamethod->attach_to_class >>.
182 =item B<< Moose::Meta;:Method::Destructor->is_needed($metaclass) >>
184 Given a L<Moose::Meta::Class> object, this method returns a boolean
185 indicating whether the class needs a destructor. If the class or any
186 of its parents defines a C<DEMOLISH> method, it needs a destructor.
192 See L<Moose/BUGS> for details on reporting bugs.