use strict;
use warnings;
-use Carp 'confess';
+use Devel::GlobalDestruction ();
use Scalar::Util 'blessed', 'weaken';
+use Try::Tiny;
-our $VERSION = '0.01';
-our $AUTHORITY = 'cpan:STEVAN';
-
-use base 'Moose::Meta::Method';
+use base 'Moose::Meta::Method',
+ 'Class::MOP::Method::Inlined';
sub new {
my $class = shift;
my %options = @_;
-
- (exists $options{options} && ref $options{options} eq 'HASH')
- || confess "You must pass a hash of options";
-
+
+ (ref $options{options} eq 'HASH')
+ || $class->throw_error("You must pass a hash of options", data => $options{options});
+
+ ($options{package_name} && $options{name})
+ || $class->throw_error("You must supply the package_name and name parameters $Class::MOP::Method::UPGRADE_ERROR_TEXT");
+
my $self = bless {
# from our superclass
- '&!body' => undef,
+ 'body' => undef,
+ 'package_name' => $options{package_name},
+ 'name' => $options{name},
# ...
- '%!options' => $options{options},
- '$!associated_metaclass' => $options{metaclass},
+ '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->intialize_body;
+ $self->_initialize_body;
- return $self;
+ return $self;
}
-## accessors
+## accessors
-sub options { (shift)->{'%!options'} }
-sub associated_metaclass { (shift)->{'$!associated_metaclass'} }
+sub options { (shift)->{'options'} }
## method
-sub is_needed { defined $_[0]->{'&!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");
-sub intialize_body {
+ 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 $source = 'sub {';
- my @DEMOLISH_calls;
- foreach my $method ($self->associated_metaclass->find_all_methods_by_name('DEMOLISH')) {
- push @DEMOLISH_calls => '$_[0]->' . $method->{class} . '::DEMOLISH()';
+ 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);
}
-
- $source .= join "\n" => @DEMOLISH_calls;
-
- $source .= ";\n" . '}';
- warn $source if $self->options->{debug};
-
- my $code;
- {
- $code = eval $source;
- confess "Could not eval the destructor :\n\n$source\n\nbecause :\n\n$@" if $@;
- }
- $self->{'&!body'} = $code;
+ 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 $_;',
+ '};',
+ );
}
1;
+# ABSTRACT: Method Meta Object for destructors
+
__END__
=pod
-=cut
\ No newline at end of file
+=head1 DESCRIPTION
+
+This class is a subclass of L<Class::MOP::Method::Inlined> that
+provides Moose-specific functionality for inlining destructors.
+
+To understand this class, you should read the the
+L<Class::MOP::Method::Inlined> documentation as well.
+
+=head1 INHERITANCE
+
+C<Moose::Meta::Method::Destructor> is a subclass of
+L<Moose::Meta::Method> I<and> L<Class::MOP::Method::Inlined>.
+
+=head1 METHODS
+
+=over 4
+
+=item B<< Moose::Meta::Method::Destructor->new(%options) >>
+
+This constructs a new object. It accepts the following options:
+
+=over 8
+
+=item * package_name
+
+The package for the class in which the destructor is being
+inlined. This option is required.
+
+=item * name
+
+The name of the destructor method. This option is required.
+
+=item * metaclass
+
+The metaclass for the class this destructor belongs to. This is
+optional, as it can be set later by calling C<<
+$metamethod->attach_to_class >>.
+
+=back
+
+=item B<< Moose::Meta;:Method::Destructor->is_needed($metaclass) >>
+
+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.
+
+=back
+
+=head1 BUGS
+
+See L<Moose/BUGS> for details on reporting bugs.
+
+=cut
+
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