use strict;
use warnings;
+use Devel::GlobalDestruction ();
use Scalar::Util 'blessed', 'weaken';
-
-our $VERSION = '0.67';
-$VERSION = eval $VERSION;
-our $AUTHORITY = 'cpan:STEVAN';
+use Try::Tiny;
use base 'Moose::Meta::Method',
- 'Class::MOP::Method::Generated';
+ 'Class::MOP::Method::Inlined';
sub new {
my $class = shift;
my %options = @_;
-
+
(ref $options{options} eq 'HASH')
|| $class->throw_error("You must pass a hash of options", data => $options{options});
my $self = bless {
# from our superclass
- 'body' => undef,
+ 'body' => undef,
'package_name' => $options{package_name},
- 'name' => $options{name},
+ 'name' => $options{name},
# ...
- 'options' => $options{options},
+ 'options' => $options{options},
+ 'definition_context' => $options{definition_context},
'associated_metaclass' => $options{metaclass},
} => $class;
- # we don't want this creating
- # a cycle in the code, if not
+ # we don't want this creating
+ # a cycle in the code, if not
# needed
- weaken($self->{'associated_metaclass'});
+ weaken($self->{'associated_metaclass'});
- $self->initialize_body;
+ $self->_initialize_body;
- return $self;
+ return $self;
}
-## accessors
+## accessors
sub options { (shift)->{'options'} }
-sub associated_metaclass { (shift)->{'associated_metaclass'} }
## method
-sub is_needed {
- my $self = shift;
- # if called as a class method
- # then must pass in a class name
- unless (blessed $self) {
- (blessed $_[0] && $_[0]->isa('Class::MOP::Class'))
- || $self->throw_error("When calling is_needed as a class method you must pass a class name");
- return $_[0]->meta->can('DEMOLISH');
- }
- defined $self->{'body'} ? 1 : 0
+sub is_needed {
+ my $self = shift;
+ my $metaclass = shift;
+
+ ( blessed $metaclass && $metaclass->isa('Class::MOP::Class') )
+ || $self->throw_error(
+ "The is_needed method expected a metaclass object as its arugment");
+
+ return $metaclass->find_method_by_name("DEMOLISHALL");
}
sub initialize_body {
+ Carp::cluck('The initialize_body method has been made private.'
+ . " The public version is deprecated and will be removed in a future release.\n");
+ shift->_initialize_body;
+}
+
+sub _initialize_body {
my $self = shift;
# TODO:
- # the %options should also include a both
- # a call 'initializer' and call 'SUPER::'
- # options, which should cover approx 90%
- # of the possible use cases (even if it
- # requires some adaption on the part of
+ # the %options should also include a both
+ # a call 'initializer' and call 'SUPER::'
+ # options, which should cover approx 90%
+ # of the possible use cases (even if it
+ # requires some adaption on the part of
# the author, after all, nothing is free)
-
- my @DEMOLISH_methods = $self->associated_metaclass->find_all_methods_by_name('DEMOLISH');
-
- return unless @DEMOLISH_methods;
-
- my $source = 'sub {';
-
- my @DEMOLISH_calls;
- foreach my $method (@DEMOLISH_methods) {
- push @DEMOLISH_calls => '$_[0]->' . $method->{class} . '::DEMOLISH()';
- }
-
- $source .= join ";\n" => @DEMOLISH_calls;
- $source .= ";\n" . '}';
- warn $source if $self->options->{debug};
-
- my $code = $self->_compile_code(
- environment => {},
- code => $source,
- ) or $self->throw_error("Could not eval the destructor :\n\n$source\n\nbecause :\n\n$@", error => $@, data => $source);
+ my $class = $self->associated_metaclass->name;
+ my @source = (
+ 'sub {',
+ 'my $self = shift;',
+ 'return ' . $self->_generate_fallback_destructor('$self'),
+ 'if Scalar::Util::blessed($self) ne \'' . $class . '\';',
+ $self->_generate_DEMOLISHALL('$self'),
+ 'return;',
+ '}',
+ );
+ warn join("\n", @source) if $self->options->{debug};
+
+ my $code = try {
+ $self->_compile_code(source => \@source);
+ }
+ catch {
+ my $source = join("\n", @source);
+ $self->throw_error(
+ "Could not eval the destructor :\n\n$source\n\nbecause :\n\n$_",
+ error => $_,
+ data => $source,
+ );
+ };
$self->{'body'} = $code;
}
+sub _generate_fallback_destructor {
+ my $self = shift;
+ my ($inv) = @_;
+
+ return $inv . '->Moose::Object::DESTROY(@_)';
+}
+
+sub _generate_DEMOLISHALL {
+ my $self = shift;
+ my ($inv) = @_;
+
+ my @methods = $self->associated_metaclass->find_all_methods_by_name('DEMOLISH');
+ return unless @methods;
+
+ return (
+ 'local $?;',
+ 'my $igd = Devel::GlobalDestruction::in_global_destruction;',
+ 'Try::Tiny::try {',
+ (map { $inv . '->' . $_->{class} . '::DEMOLISH($igd);' } @methods),
+ '}',
+ 'Try::Tiny::catch {',
+ 'die $_;',
+ '};',
+ );
+}
+
1;
+# ABSTRACT: Method Meta Object for destructors
+
__END__
=pod
-=head1 NAME
+=head1 DESCRIPTION
+
+This class is a subclass of L<Class::MOP::Method::Inlined> that
+provides Moose-specific functionality for inlining destructors.
-Moose::Meta::Method::Destructor - Method Meta Object for destructors
+To understand this class, you should read the the
+L<Class::MOP::Method::Inlined> documentation as well.
-=head1 DESCRIPTION
+=head1 INHERITANCE
-This is a subclass of L<Class::MOP::Method> which handles
-constructing an approprate Destructor method. This is primarily
-used in the making of immutable metaclasses, otherwise it is
-not particularly useful.
+C<Moose::Meta::Method::Destructor> is a subclass of
+L<Moose::Meta::Method> I<and> L<Class::MOP::Method::Inlined>.
=head1 METHODS
=over 4
-=item B<new>
+=item B<< Moose::Meta::Method::Destructor->new(%options) >>
-=item B<attributes>
+This constructs a new object. It accepts the following options:
-=item B<meta_instance>
+=over 8
-=item B<options>
+=item * package_name
-=item B<is_needed>
+The package for the class in which the destructor is being
+inlined. This option is required.
-=item B<initialize_body>
+=item * name
-=item B<associated_metaclass>
+The name of the destructor method. This option is required.
-=back
+=item * metaclass
-=head1 AUTHORS
+The metaclass for the class this destructor belongs to. This is
+optional, as it can be set later by calling C<<
+$metamethod->attach_to_class >>.
-Stevan Little E<lt>stevan@iinteractive.comE<gt>
+=back
+
+=item B<< Moose::Meta;:Method::Destructor->is_needed($metaclass) >>
-=head1 COPYRIGHT AND LICENSE
+Given a L<Moose::Meta::Class> object, this method returns a boolean
+indicating whether the class needs a destructor. If the class or any
+of its parents defines a C<DEMOLISH> method, it needs a destructor.
-Copyright 2006-2009 by Infinity Interactive, Inc.
+=back
-L<http://www.iinteractive.com>
+=head1 BUGS
-This library is free software; you can redistribute it and/or modify
-it under the same terms as Perl itself.
+See L<Moose/BUGS> for details on reporting bugs.
=cut
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