use Scalar::Util 'blessed', 'reftype', 'weaken';
use Sub::Name 'subname';
-our $VERSION = '0.26';
+our $VERSION = '0.30';
our $AUTHORITY = 'cpan:STEVAN';
use base 'Class::MOP::Module';
-# Self-introspection
-
-sub meta { Class::MOP::Class->initialize(blessed($_[0]) || $_[0]) }
-
# Creation
sub initialize {
"(I found an uneven number of params in \@_)";
my (%options) = @_;
+
+ (ref $options{superclasses} eq 'ARRAY')
+ || confess "You must pass an ARRAY ref of superclasses"
+ if exists $options{superclasses};
+
+ (ref $options{attributes} eq 'ARRAY')
+ || confess "You must pass an ARRAY ref of attributes"
+ if exists $options{attributes};
+
+ (ref $options{methods} eq 'HASH')
+ || confess "You must pass an HASH ref of methods"
+ if exists $options{methods};
my $code = "package $package_name;";
$code .= "\$$package_name\:\:VERSION = '" . $options{version} . "';"
my $meta_instance = $class->get_meta_instance();
my $clone = $meta_instance->clone_instance($instance);
foreach my $attr ($class->compute_all_applicable_attributes()) {
- if (exists $params{$attr->init_arg}) {
- $meta_instance->set_slot_value($clone, $attr->name, $params{$attr->init_arg});
+ if ( defined( my $init_arg = $attr->init_arg ) ) {
+ if (exists $params{$init_arg}) {
+ $attr->set_value($clone, $params{$init_arg});
+ }
}
}
return $clone;
}
sub rebless_instance {
- my ($self, $instance) = @_;
- my $old_metaclass = $instance->meta();
+ my ($self, $instance, %params) = @_;
+
+ my $old_metaclass;
+ if ($instance->can('meta')) {
+ ($instance->meta->isa('Class::MOP::Class'))
+ || confess 'Cannot rebless instance if ->meta is not an instance of Class::MOP::Class';
+ $old_metaclass = $instance->meta;
+ }
+ else {
+ $old_metaclass = $self->initialize(blessed($instance));
+ }
+
my $meta_instance = $self->get_meta_instance();
$self->name->isa($old_metaclass->name)
- || confess "You may rebless only into a subclass. (". $self->name .") is not a subclass of (". $old_metaclass->name .").";
+ || confess "You may rebless only into a subclass of (". $old_metaclass->name ."), of which (". $self->name .") isn't.";
# rebless!
$meta_instance->rebless_instance_structure($instance, $self);
- # check and upgrade all attributes
- my %params = map { $_->name => $meta_instance->get_slot_value($instance, $_->name) }
- grep { $meta_instance->is_slot_initialized($instance, $_->name) }
- $self->compute_all_applicable_attributes;
+ foreach my $attr ( $self->compute_all_applicable_attributes ) {
+ if ( $attr->has_value($instance) ) {
+ if ( defined( my $init_arg = $attr->init_arg ) ) {
+ $params{$init_arg} = $attr->get_value($instance)
+ unless exists $params{$init_arg};
+ }
+ else {
+ $attr->set_value($instance, $attr->get_value($instance));
+ }
+ }
+ }
foreach my $attr ($self->compute_all_applicable_attributes) {
$attr->initialize_instance_slot($meta_instance, $instance, \%params);
}
+
+ $instance;
}
# Inheritance
sub linearized_isa {
- if (Class::MOP::IS_RUNNING_ON_5_10()) {
- return @{ mro::get_linear_isa( (shift)->name ) };
- }
- else {
- my %seen;
- return grep { !($seen{$_}++) } (shift)->class_precedence_list;
- }
+ return @{ mro::get_linear_isa( (shift)->name ) };
}
sub class_precedence_list {
my $self = shift;
+ my $name = $self->name;
unless (Class::MOP::IS_RUNNING_ON_5_10()) {
# NOTE:
# blow up otherwise. Yes, it's an ugly hack, better
# suggestions are welcome.
# - SL
- ($self->name || return)->isa('This is a test for circular inheritance')
+ ($name || return)->isa('This is a test for circular inheritance')
}
- (
- $self->name,
- map {
- $self->initialize($_)->class_precedence_list()
- } $self->superclasses()
- );
+ # if our mro is c3, we can
+ # just grab the linear_isa
+ if (mro::get_mro($name) eq 'c3') {
+ return @{ mro::get_linear_isa($name) }
+ }
+ else {
+ # NOTE:
+ # we can't grab the linear_isa for dfs
+ # since it has all the duplicates
+ # already removed.
+ return (
+ $name,
+ map {
+ $self->initialize($_)->class_precedence_list()
+ } $self->superclasses()
+ );
+ }
}
## Methods
print STDERR "# of Metaclass options: ", keys %IMMUTABLE_OPTIONS;
print STDERR "# of Immutable transformers: ", keys %IMMUTABLE_TRANSFORMERS;
}
+
+ 1;
}
sub make_mutable{
confess "unable to find immutabilizing options" unless ref $options;
my $transformer = delete $options->{IMMUTABLE_TRANSFORMER};
$transformer->make_metaclass_mutable($self, $options);
+ 1;
}
}
=item B<reset_package_cache_flag>
-Clear this flag, used in Moose.
+Clears the package cache flag to announce to the internals that we need
+to rebuild the method map.
=back
=item B<instance_metaclass>
+Returns the class name of the instance metaclass, see L<Class::MOP::Instance>
+for more information on the instance metaclasses.
+
=item B<get_meta_instance>
+Returns an instance of L<Class::MOP::Instance> to be used in the construction
+of a new instance of the class.
+
=item B<new_object (%params)>
This is a convience method for creating a new object of the class, and
$class->meta->new_object(%params);
}
-Of course the ideal place for this would actually be in C<UNIVERSAL::>
-but that is considered bad style, so we do not do that.
-
=item B<construct_instance (%params)>
-This method is used to construct an instace structure suitable for
+This method is used to construct an instance structure suitable for
C<bless>-ing into your package of choice. It works in conjunction
with the Attribute protocol to collect all applicable attributes.
$self->meta->clone_object($self, %params);
}
-Of course the ideal place for this would actually be in C<UNIVERSAL::>
-but that is considered bad style, so we do not do that.
-
=item B<clone_instance($instance, %params)>
This method is a compliment of C<construct_instance> (which means if
think Yuval "nothingmuch" Kogman put it best when he said that cloning
is too I<context-specific> to be part of the MOP.
-=item B<rebless_instance($instance)>
+=item B<rebless_instance($instance, ?%params)>
This will change the class of C<$instance> to the class of the invoking
C<Class::MOP::Class>. You may only rebless the instance to a subclass of
-itself. This limitation may be relaxed in the future.
-
-This can be useful in a number of situations, such as when you are writing
-a program that doesn't know everything at object construction time.
+itself. You may pass in optional C<%params> which are like constructor
+params and will override anything already defined in the instance.
=back
relationships of the class the B<Class::MOP::Class> instance is
associated with. Basically, it can get and set the C<@ISA> for you.
-B<NOTE:>
-Perl will occasionally perform some C<@ISA> and method caching, if
-you decide to change your superclass relationship at runtime (which
-is quite insane and very much not recommened), then you should be
-aware of this and the fact that this module does not make any
-attempt to address this issue.
-
=item B<class_precedence_list>
This computes the a list of all the class's ancestors in the same order
-in which method dispatch will be done. This is similair to
-what B<Class::ISA::super_path> does, but we don't remove duplicate names.
+in which method dispatch will be done. This is similair to what
+B<Class::ISA::super_path> does, but we don't remove duplicate names.
=item B<linearized_isa>
=item B<subclasses>
-This returns a list of subclasses for this class.
+This returns a list of subclasses for this class.
=back
=item B<get_method_map>
+Returns a HASH ref of name to CODE reference mapping for this class.
+
=item B<method_metaclass>
+Returns the class name of the method metaclass, see L<Class::MOP::Method>
+for more information on the method metaclasses.
+
=item B<add_method ($method_name, $method)>
This will take a C<$method_name> and CODE reference to that
=item B<attribute_metaclass>
+Returns the class name of the attribute metaclass, see L<Class::MOP::Attribute>
+for more information on the attribute metaclasses.
+
=item B<get_attribute_map>
-=item B<add_attribute ($attribute_meta_object | $attribute_name, %attribute_spec)>
+This returns a HASH ref of name to attribute meta-object mapping.
+
+=item B<add_attribute ($attribute_meta_object | ($attribute_name, %attribute_spec))>
This stores the C<$attribute_meta_object> (or creates one from the
C<$attribute_name> and C<%attribute_spec>) in the B<Class::MOP::Class>
projects / gitmo/Class-MOP.git / blobdiff