use Carp 'confess';
use Scalar::Util 'blessed', 'reftype', 'weaken';
-our $VERSION = '0.02';
+our $VERSION = '0.08';
sub meta {
require Class::MOP::Class;
- Class::MOP::Class->initialize($_[0])
+ Class::MOP::Class->initialize(blessed($_[0]) || $_[0]);
}
# NOTE: (meta-circularity)
(defined $name && $name)
|| confess "You must provide a name for the attribute";
- (!exists $options{reader} && !exists $options{writer})
- || confess "You cannot declare an accessor and reader and/or writer functions"
- if exists $options{accessor};
+ $options{init_arg} = $name
+ if not exists $options{init_arg};
bless {
name => $name,
} => $class;
}
+# NOTE:
+# this is a primative (and kludgy) clone operation
+# for now, it will be repleace in the Class::MOP
+# bootstrap with a proper one, however we know
+# that this one will work fine for now.
+sub clone {
+ my $self = shift;
+ my %options = @_;
+ (blessed($self))
+ || confess "Can only clone an instance";
+ return bless { %{$self}, %options } => blessed($self);
+}
+
+sub initialize_instance_slot {
+ my ($self, $instance, $params) = @_;
+ my $init_arg = $self->{init_arg};
+ # try to fetch the init arg from the %params ...
+ my $val;
+ $val = $params->{$init_arg} if exists $params->{$init_arg};
+ # if nothing was in the %params, we can use the
+ # attribute's default value (if it has one)
+ if (!defined $val && defined $self->{default}) {
+ $val = $self->default($instance);
+ }
+ $self->associated_class
+ ->get_meta_instance
+ ->set_slot_value($instance, $self->name, $val);
+}
+
+# NOTE:
+# the next bunch of methods will get bootstrapped
+# away in the Class::MOP bootstrapping section
+
sub name { $_[0]->{name} }
+sub associated_class { $_[0]->{associated_class} }
+
sub has_accessor { defined($_[0]->{accessor}) ? 1 : 0 }
sub has_reader { defined($_[0]->{reader}) ? 1 : 0 }
sub has_writer { defined($_[0]->{writer}) ? 1 : 0 }
sub predicate { $_[0]->{predicate} }
sub init_arg { $_[0]->{init_arg} }
+# end bootstrapped away method section.
+# (all methods below here are kept intact)
+
sub default {
my $self = shift;
if (reftype($self->{default}) && reftype($self->{default}) eq 'CODE') {
# class association
-sub associated_class { $_[0]->{associated_class} }
-
sub attach_to_class {
my ($self, $class) = @_;
(blessed($class) && $class->isa('Class::MOP::Class'))
## Method generation helpers
sub generate_accessor_method {
- my ($self, $attr_name) = @_;
- eval qq{sub {
- \$_[0]->{'$attr_name'} = \$_[1] if scalar(\@_) == 2;
- \$_[0]->{'$attr_name'};
- }};
+ my $self = shift;
+ my $meta_instance = $self->associated_class->get_meta_instance;
+ my $attr_name = $self->name;
+ return sub {
+ $meta_instance->set_slot_value($_[0], $attr_name, $_[1]) if scalar(@_) == 2;
+ $meta_instance->get_slot_value($_[0], $attr_name);
+ };
}
sub generate_reader_method {
- my ($self, $attr_name) = @_;
- eval qq{sub {
- \$_[0]->{'$attr_name'};
- }};
+ my $self = shift;
+ my $meta_instance = $self->associated_class->get_meta_instance;
+ my $attr_name = $self->name;
+ return sub {
+ confess "Cannot assign a value to a read-only accessor" if @_ > 1;
+ $meta_instance->get_slot_value($_[0], $attr_name);
+ };
}
sub generate_writer_method {
- my ($self, $attr_name) = @_;
- eval qq{sub {
- \$_[0]->{'$attr_name'} = \$_[1];
- }};
+ my $self = shift;
+ my $meta_instance = $self->associated_class->get_meta_instance;
+ my $attr_name = $self->name;
+ return sub {
+ $meta_instance->set_slot_value($_[0], $attr_name, $_[1]);
+ };
}
sub generate_predicate_method {
- my ($self, $attr_name) = @_;
- eval qq{sub {
- defined \$_[0]->{'$attr_name'} ? 1 : 0;
- }};
+ my $self = shift;
+ my $meta_instance = $self->associated_class->get_meta_instance;
+ my $attr_name = $self->name;
+ return sub {
+ defined $meta_instance->get_slot_value($_[0], $attr_name) ? 1 : 0;
+ };
}
sub process_accessors {
my ($self, $type, $accessor) = @_;
- if (reftype($accessor) && reftype($accessor) eq 'HASH') {
+ if (reftype($accessor)) {
+ (reftype($accessor) eq 'HASH')
+ || confess "bad accessor/reader/writer/predicate format, must be a HASH ref";
my ($name, $method) = each %{$accessor};
return ($name, Class::MOP::Attribute::Accessor->wrap($method));
}
MyClass->meta->construct_instance(-foo => "Hello There");
+In an init_arg is not assigned, it will automatically use the
+value of C<$name>.
+
=item I<default>
The value of this key is the default value which
=back
+=item B<clone (%options)>
+
+=item B<initialize_instance_slot ($instance, $params)>
+
=back
=head2 Informational
=item B<detach_from_class>
+=item B<slot_name>
+
+=item B<allocate_slots>
+
+=item B<deallocate_slots>
+
=back
=head2 Attribute Accessor generation
=over 4
-=item B<generate_accessor_method ($attr_name)>
+=item B<generate_accessor_method>
-=item B<generate_predicate_method ($attr_name)>
+=item B<generate_predicate_method>
-=item B<generate_reader_method ($attr_name)>
+=item B<generate_reader_method>
-=item B<generate_writer_method ($attr_name)>
+=item B<generate_writer_method>
=back