package Moose::Meta::Method::Destructor;
use strict;
use warnings;
use Carp 'confess';
use Scalar::Util 'blessed', 'weaken';
our $VERSION = '0.01';
our $AUTHORITY = 'cpan:STEVAN';
use base 'Moose::Meta::Method',
'Class::MOP::Method::Generated';
sub new {
my $class = shift;
my %options = @_;
(exists $options{options} && ref $options{options} eq 'HASH')
|| confess "You must pass a hash of options";
my $self = bless {
# from our superclass
'&!body' => undef,
# ...
'%!options' => $options{options},
'$!associated_metaclass' => $options{metaclass},
} => $class;
# we don't want this creating
# a cycle in the code, if not
# needed
weaken($self->{'$!associated_metaclass'});
$self->intialize_body;
return $self;
}
## accessors
sub options { (shift)->{'%!options'} }
sub associated_metaclass { (shift)->{'$!associated_metaclass'} }
## method
sub is_needed { defined $_[0]->{'&!body'} ? 1 : 0 }
sub intialize_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 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()';
}
$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;
}
1;
__END__
=pod
=head1 NAME
Moose::Meta::Method::Destructor - Method Meta Object for destructors
=head1 DESCRIPTION
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.
=head1 METHODS
=over 4
=item B<new>
=item B<attributes>
=item B<meta_instance>
=item B<options>
=item B<is_needed>
=item B<intialize_body>
=item B<associated_metaclass>
=back
=head1 AUTHORS
Stevan Little E<lt>stevan@iinteractive.comE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright 2006-2008 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut