use Carp 'confess';
use Scalar::Util 'blessed', 'reftype', 'weaken';
-our $VERSION = '0.02';
+our $VERSION = '0.10';
sub meta {
require Class::MOP::Class;
- Class::MOP::Class->initialize($_[0])
+ Class::MOP::Class->initialize(blessed($_[0]) || $_[0]);
}
# NOTE: (meta-circularity)
-# This method will be replaces in the
+# This method will be replaced in the
# boostrap section of Class::MOP, by
# a new version which uses the
# &Class::MOP::Class::construct_instance
(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};
+ $options{init_arg} = $name
+ if not exists $options{init_arg};
bless {
name => $name,
}
# NOTE:
+# this is a primative (and kludgy) clone operation
+# for now, it will be replaced 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, $meta_instance, $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);
+ }
+ $meta_instance->set_slot_value($instance, $self->name, $val);
+}
+
+# NOTE:
# the next bunch of methods will get bootstrapped
# away in the Class::MOP bootstrapping section
# end bootstrapped away method section.
# (all methods below here are kept intact)
+sub is_default_a_coderef {
+ (reftype($_[0]->{default}) && reftype($_[0]->{default}) eq 'CODE')
+}
+
sub default {
- my $self = shift;
- if (reftype($self->{default}) && reftype($self->{default}) eq 'CODE') {
+ my ($self, $instance) = @_;
+ if ($instance && $self->is_default_a_coderef) {
# if the default is a CODE ref, then
# we pass in the instance and default
# can return a value based on that
# instance. Somewhat crude, but works.
- return $self->{default}->(shift);
+ return $self->{default}->($instance);
}
$self->{default};
}
+# slots
+
+sub slots { (shift)->name }
+
# class association
sub attach_to_class {
$self->{associated_class} = undef;
}
+## Slot management
+
+sub set_value {
+ my ( $self, $instance, $value ) = @_;
+
+ Class::MOP::Class->initialize(Scalar::Util::blessed($instance))
+ ->get_meta_instance
+ ->set_slot_value( $instance, $self->name, $value );
+}
+
+sub get_value {
+ my ( $self, $instance ) = @_;
+
+ Class::MOP::Class->initialize(Scalar::Util::blessed($instance))
+ ->get_meta_instance
+ ->get_slot_value( $instance, $self->name );
+}
+
## Method generation helpers
sub generate_accessor_method {
- my ($self, $attr_name) = @_;
- eval qq{sub {
- \$_[0]->{'$attr_name'} = \$_[1] if scalar(\@_) == 2;
- \$_[0]->{'$attr_name'};
- }};
+ my $attr = shift;
+ return sub {
+ $attr->set_value( $_[0], $_[1] ) if scalar(@_) == 2;
+ $attr->get_value( $_[0] );
+ };
+}
+
+sub generate_accessor_method_inline {
+ my $self = shift;
+ my $attr_name = $self->name;
+ my $meta_instance = $self->associated_class->instance_metaclass;
+
+ my $code = eval 'sub {'
+ . $meta_instance->inline_set_slot_value('$_[0]', "'$attr_name'", '$_[1]') . ' if scalar(@_) == 2; '
+ . $meta_instance->inline_get_slot_value('$_[0]', "'$attr_name'")
+ . '}';
+ confess "Could not generate inline accessor because : $@" if $@;
+
+ return $code;
}
sub generate_reader_method {
- my ($self, $attr_name) = @_;
- eval qq{sub {
- \$_[0]->{'$attr_name'};
- }};
+ my $attr = shift;
+ return sub {
+ confess "Cannot assign a value to a read-only accessor" if @_ > 1;
+ $attr->get_value( $_[0] );
+ };
+}
+
+sub generate_reader_method_inline {
+ my $self = shift;
+ my $attr_name = $self->name;
+ my $meta_instance = $self->associated_class->instance_metaclass;
+
+ my $code = eval 'sub {'
+ . 'confess "Cannot assign a value to a read-only accessor" if @_ > 1;'
+ . $meta_instance->inline_get_slot_value('$_[0]', "'$attr_name'")
+ . '}';
+ confess "Could not generate inline accessor because : $@" if $@;
+
+ return $code;
}
sub generate_writer_method {
- my ($self, $attr_name) = @_;
- eval qq{sub {
- \$_[0]->{'$attr_name'} = \$_[1];
- }};
+ my $attr = shift;
+ return sub {
+ $attr->set_value( $_[0], $_[1] );
+ };
+}
+
+sub generate_writer_method_inline {
+ my $self = shift;
+ my $attr_name = $self->name;
+ my $meta_instance = $self->associated_class->instance_metaclass;
+
+ my $code = eval 'sub {'
+ . $meta_instance->inline_set_slot_value('$_[0]', "'$attr_name'", '$_[1]')
+ . '}';
+ confess "Could not generate inline accessor because : $@" if $@;
+
+ return $code;
}
sub generate_predicate_method {
- my ($self, $attr_name) = @_;
- eval qq{sub {
- defined \$_[0]->{'$attr_name'} ? 1 : 0;
- }};
+ my $self = shift;
+ my $attr_name = $self->name;
+ return sub {
+ defined Class::MOP::Class->initialize(Scalar::Util::blessed($_[0]))
+ ->get_meta_instance
+ ->get_slot_value($_[0], $attr_name) ? 1 : 0;
+ };
+}
+
+sub generate_predicate_method_inline {
+ my $self = shift;
+ my $attr_name = $self->name;
+ my $meta_instance = $self->associated_class->instance_metaclass;
+
+ my $code = eval 'sub {'
+ . 'defined ' . $meta_instance->inline_get_slot_value('$_[0]', "'$attr_name'") . ' ? 1 : 0'
+ . '}';
+ confess "Could not generate inline accessor because : $@" if $@;
+
+ return $code;
}
sub process_accessors {
- my ($self, $type, $accessor) = @_;
- if (reftype($accessor) && reftype($accessor) eq 'HASH') {
- my ($name, $method) = each %{$accessor};
+ my ($self, $type, $accessor, $generate_as_inline_methods) = @_;
+ if (reftype($accessor)) {
+ (reftype($accessor) eq 'HASH')
+ || confess "bad accessor/reader/writer/predicate format, must be a HASH ref";
+ my ($name, $method) = %{$accessor};
return ($name, Class::MOP::Attribute::Accessor->wrap($method));
}
else {
- my $generator = $self->can('generate_' . $type . '_method');
+ my $inline_me = ($generate_as_inline_methods && $self->associated_class->instance_metaclass->is_inlinable);
+ my $generator = $self->can('generate_' . $type . '_method' . ($inline_me ? '_inline' : ''));
($generator)
|| confess "There is no method generator for the type='$type'";
if (my $method = $self->$generator($self->name)) {
}
sub install_accessors {
- my $self = shift;
- my $class = $self->associated_class;
+ my $self = shift;
+ my $inline = shift;
+ my $class = $self->associated_class;
$class->add_method(
- $self->process_accessors('accessor' => $self->accessor())
+ $self->process_accessors('accessor' => $self->accessor(), $inline)
) if $self->has_accessor();
$class->add_method(
- $self->process_accessors('reader' => $self->reader())
+ $self->process_accessors('reader' => $self->reader(), $inline)
) if $self->has_reader();
$class->add_method(
- $self->process_accessors('writer' => $self->writer())
+ $self->process_accessors('writer' => $self->writer(), $inline)
) if $self->has_writer();
$class->add_method(
- $self->process_accessors('predicate' => $self->predicate())
+ $self->process_accessors('predicate' => $self->predicate(), $inline)
) if $self->has_predicate();
+
return;
}
=back
+=item B<clone (%options)>
+
+=item B<initialize_instance_slot ($instance, $params)>
+
=back
+=head2 Value management
+
+=over 4
+
+=item set_value $instance, $value
+
+Set the value without going through the accessor. Note that this may be done to
+even attributes with just read only accessors.
+
+=item get_value $instance
+
+Return the value without going through the accessor. Note that this may be done
+even to attributes with just write only accessors.
+
+=back
+
=head2 Informational
These are all basic read-only value accessors for the values
=item B<init_arg>
+=item B<is_default_a_coderef>
+
=item B<default (?$instance)>
As noted in the documentation for C<new> above, if the I<default>
value is a CODE reference, this accessor will pass a single additional
argument C<$instance> into it and return the value.
+=item B<slots>
+
+Returns a list of slots required by the attribute. This is usually
+just one, which is the name of the attribute.
+
=back
=head2 Informational predicates
=item B<detach_from_class>
+=item B<slot_name>
+
+=item B<allocate_slots>
+
+=item B<deallocate_slots>
+
=back
=head2 Attribute Accessor generation
=over 4
-=item B<generate_accessor_method ($attr_name)>
+=item B<generate_accessor_method>
+
+=item B<generate_predicate_method>
+
+=item B<generate_reader_method>
+
+=item B<generate_writer_method>
+
+=back
+
+=over 4
+
+=item B<generate_accessor_method_inline>
-=item B<generate_predicate_method ($attr_name)>
+=item B<generate_predicate_method_inline>
-=item B<generate_reader_method ($attr_name)>
+=item B<generate_reader_method_inline>
-=item B<generate_writer_method ($attr_name)>
+=item B<generate_writer_method_inline>
=back
=back
-=head1 AUTHOR
+=head1 AUTHORS
Stevan Little E<lt>stevan@iinteractive.comE<gt>
+Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
+
=head1 COPYRIGHT AND LICENSE
Copyright 2006 by Infinity Interactive, Inc.
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
-=cut
\ No newline at end of file
+=cut
+
projects / gitmo/Class-MOP.git / blobdiff