use Scalar::Util 'weaken', 'blessed';
-our $VERSION = '0.05';
+our $VERSION = '0.78';
+$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
use base 'Class::MOP::Object';
+sub BUILDARGS {
+ my ($class, @args) = @_;
+
+ if ( @args == 1 ) {
+ unshift @args, "associated_metaclass";
+ } elsif ( @args >= 2 && blessed($args[0]) && $args[0]->isa("Class::MOP::Class") ) {
+ # compat mode
+ my ( $meta, @attrs ) = @args;
+ @args = ( associated_metaclass => $meta, attributes => \@attrs );
+ }
+
+ my %options = @args;
+ # FIXME lazy_build
+ $options{slots} ||= [ map { $_->slots } @{ $options{attributes} || [] } ];
+ $options{slot_hash} = { map { $_ => undef } @{ $options{slots} } }; # FIXME lazy_build
+
+ return \%options;
+}
+
sub new {
- my ($class, $meta, @attrs) = @_;
- my @slots = map { $_->slots } @attrs;
- my $instance = bless {
+ my $class = shift;
+ my $options = $class->BUILDARGS(@_);
+
+ # FIXME replace with a proper constructor
+ my $instance = $class->_new(%$options);
+
+ # FIXME weak_ref => 1,
+ weaken($instance->{'associated_metaclass'});
+
+ return $instance;
+}
+
+sub _new {
+ my ( $class, %options ) = @_;
+ bless {
# NOTE:
# I am not sure that it makes
# sense to pass in the meta
# which is *probably* a safe
# assumption,.. but you can
# never tell <:)
- '$!meta' => $meta,
- '@!slots' => { map { $_ => undef } @slots },
+ 'associated_metaclass' => $options{associated_metaclass},
+ 'attributes' => $options{attributes},
+ 'slots' => $options{slots},
+ 'slot_hash' => $options{slot_hash},
} => $class;
-
- weaken($instance->{'$!meta'});
-
- return $instance;
}
-sub associated_metaclass { (shift)->{'$!meta'} }
+sub _class_name { $_[0]->{_class_name} ||= $_[0]->associated_metaclass->name }
+
+sub associated_metaclass { $_[0]{'associated_metaclass'} }
sub create_instance {
my $self = shift;
- $self->bless_instance_structure({});
+ bless {}, $self->_class_name;
}
+# for compatibility
sub bless_instance_structure {
my ($self, $instance_structure) = @_;
- bless $instance_structure, $self->associated_metaclass->name;
+ bless $instance_structure, $self->_class_name;
}
sub clone_instance {
my ($self, $instance) = @_;
- $self->bless_instance_structure({ %$instance });
+ bless { %$instance }, $self->_class_name;
}
# operations on meta instance
sub get_all_slots {
my $self = shift;
- return keys %{$self->{'@!slots'}};
+ return @{$self->{'slots'}};
+}
+
+sub get_all_attributes {
+ my $self = shift;
+ return @{$self->{attributes}};
}
sub is_valid_slot {
my ($self, $slot_name) = @_;
- exists $self->{'@!slots'}->{$slot_name};
+ exists $self->{'slot_hash'}->{$slot_name};
}
# operations on created instances
sub initialize_slot {
my ($self, $instance, $slot_name) = @_;
- #$self->set_slot_value($instance, $slot_name, undef);
+ return;
}
sub deinitialize_slot {
bless $instance, $metaclass->name;
}
+sub is_dependent_on_superclasses {
+ return; # for meta instances that require updates on inherited slot changes
+}
+
# inlinable operation snippets
sub is_inlinable { 1 }
sub inline_slot_access {
my ($self, $instance, $slot_name) = @_;
- sprintf "%s->{%s}", $instance, $slot_name;
+ sprintf q[%s->{"%s"}], $instance, quotemeta($slot_name);
}
sub inline_get_slot_value {
sub inline_initialize_slot {
my ($self, $instance, $slot_name) = @_;
- $self->inline_set_slot_value($instance, $slot_name, 'undef'),
+ return '';
}
sub inline_deinitialize_slot {
=over 4
-=item B<new ($meta, @attrs)>
+=item B<new %args>
Creates a new instance meta-object and gathers all the slots from
the list of C<@attrs> given.
+=item B<BUILDARGS>
+
+Processes arguments for compatibility.
+
=item B<meta>
-This will return a B<Class::MOP::Class> instance which is related
-to this class.
+Returns the metaclass of L<Class::MOP::Instance>.
=back
=item B<create_instance>
-This creates the appropriate structure needed for the instance and
-then calls C<bless_instance_structure> to bless it into the class.
+This creates the appropriate structure needed for the instance and blesses it.
=item B<bless_instance_structure ($instance_structure)>
This does just exactly what it says it does.
+This method has been deprecated but remains for compatibility reasons. None of
+the subclasses of L<Class::MOP::Instance> ever bothered to actually make use of
+it, so it was deemed unnecessary fluff.
+
=item B<clone_instance ($instance_structure)>
-This too does just exactly what it says it does.
+Creates a shallow clone of $instance_structure.
=back
This will return true if C<$slot_name> is a valid slot name.
+=item B<is_dependent_on_superclasses>
+
+This method returns true when the meta instance must be recreated on any
+superclass changes.
+
+Defaults to false.
+
+=item B<get_all_attributes>
+
+This will return the current list of attributes (as
+Class::MOP::Attribute objects) based on what was given to this object
+in C<new>.
+
=back
=head2 Operations on Instance Structures