2 package Moose::Meta::Method::Destructor;
7 use Devel::GlobalDestruction ();
8 use Scalar::Util 'blessed', 'weaken';
11 our $VERSION = '1.9900';
12 $VERSION = eval $VERSION;
13 our $AUTHORITY = 'cpan:STEVAN';
15 use base 'Moose::Meta::Method',
16 'Class::MOP::Method::Inlined';
22 (ref $options{options} eq 'HASH')
23 || $class->throw_error("You must pass a hash of options", data => $options{options});
25 ($options{package_name} && $options{name})
26 || $class->throw_error("You must supply the package_name and name parameters $Class::MOP::Method::UPGRADE_ERROR_TEXT");
31 'package_name' => $options{package_name},
32 'name' => $options{name},
34 'options' => $options{options},
35 'associated_metaclass' => $options{metaclass},
38 # we don't want this creating
39 # a cycle in the code, if not
41 weaken($self->{'associated_metaclass'});
43 $self->_initialize_body;
50 sub options { (shift)->{'options'} }
56 my $metaclass = shift;
58 ( blessed $metaclass && $metaclass->isa('Class::MOP::Class') )
59 || $self->throw_error(
60 "The is_needed method expected a metaclass object as its arugment");
62 return $metaclass->find_method_by_name("DEMOLISHALL");
66 Carp::cluck('The initialize_body method has been made private.'
67 . " The public version is deprecated and will be removed in a future release.\n");
68 shift->_initialize_body;
71 sub _initialize_body {
74 # the %options should also include a both
75 # a call 'initializer' and call 'SUPER::'
76 # options, which should cover approx 90%
77 # of the possible use cases (even if it
78 # requires some adaption on the part of
79 # the author, after all, nothing is free)
81 my $class = $self->associated_metaclass->name;
85 'return ' . $self->_generate_fallback_destructor('$self'),
86 'if Scalar::Util::blessed($self) ne \'' . $class . '\';',
87 $self->_generate_DEMOLISHALL('$self'),
90 warn join("\n", @source) if $self->options->{debug};
93 $self->_compile_code(source => \@source);
96 my $source = join("\n", @source);
98 "Could not eval the destructor :\n\n$source\n\nbecause :\n\n$_",
104 $self->{'body'} = $code;
107 sub _generate_fallback_destructor {
111 return $inv . '->Moose::Object::DESTROY(@_)';
114 sub _generate_DEMOLISHALL {
118 my @methods = $self->associated_metaclass->find_all_methods_by_name('DEMOLISH');
119 return unless @methods;
123 'my $igd = Devel::GlobalDestruction::in_global_destruction;',
125 (map { $inv . '->' . $_->{class} . '::DEMOLISH($igd);' } @methods),
127 'Try::Tiny::catch {',
128 'no warnings \'misc\';',
144 Moose::Meta::Method::Destructor - Method Meta Object for destructors
148 This class is a subclass of L<Class::MOP::Class::Generated> that
149 provides Moose-specific functionality for inlining destructors.
151 To understand this class, you should read the the
152 L<Class::MOP::Class::Generated> documentation as well.
156 C<Moose::Meta::Method::Destructor> is a subclass of
157 L<Moose::Meta::Method> I<and> L<Class::MOP::Method::Generated>.
163 =item B<< Moose::Meta::Method::Destructor->new(%options) >>
165 This constructs a new object. It accepts the following options:
171 The package for the class in which the destructor is being
172 inlined. This option is required.
176 The name of the destructor method. This option is required.
180 The metaclass for the class this destructor belongs to. This is
181 optional, as it can be set later by calling C<<
182 $metamethod->attach_to_class >>.
186 =item B<< Moose::Meta;:Method::Destructor->is_needed($metaclass) >>
188 Given a L<Moose::Meta::Class> object, this method returns a boolean
189 indicating whether the class needs a destructor. If the class or any
190 of its parents defines a C<DEMOLISH> method, it needs a destructor.
196 See L<Moose/BUGS> for details on reporting bugs.
200 Stevan Little E<lt>stevan@iinteractive.comE<gt>
202 =head1 COPYRIGHT AND LICENSE
204 Copyright 2006-2010 by Infinity Interactive, Inc.
206 L<http://www.iinteractive.com>
208 This library is free software; you can redistribute it and/or modify
209 it under the same terms as Perl itself.