sub new {
my $class = shift;
my %options = @_;
-
+
(exists $options{attribute})
|| confess "You must supply an attribute to construct with";
-
+
(exists $options{accessor_type})
- || confess "You must supply an accessor_type to construct with";
-
+ || confess "You must supply an accessor_type to construct with";
+
(blessed($options{attribute}) && $options{attribute}->isa('Class::MOP::Attribute'))
- || confess "You must supply an attribute which is a 'Class::MOP::Attribute' instance";
-
+ || confess "You must supply an attribute which is a 'Class::MOP::Attribute' instance";
+
my $self = bless {
# from our superclass
'&!body' => undef,
# specific to this subclass
'$!attribute' => $options{attribute},
'$!is_inline' => ($options{is_inline} || 0),
- '$!accessor_type' => $options{accessor_type},
+ '$!accessor_type' => $options{accessor_type},
} => $class;
-
- # we don't want this creating
- # a cycle in the code, if not
+
+ # we don't want this creating
+ # a cycle in the code, if not
# needed
weaken($self->{'$!attribute'});
-
+
$self->initialize_body;
-
+
return $self;
}
sub associated_attribute { (shift)->{'$!attribute'} }
sub accessor_type { (shift)->{'$!accessor_type'} }
-## factory
+## factory
sub initialize_body {
my $self = shift;
-
+
my $method_name = join "_" => (
- 'generate',
- $self->accessor_type,
+ 'generate',
+ $self->accessor_type,
'method',
($self->is_inline ? 'inline' : ())
);
-
+
eval { $self->{'&!body'} = $self->$method_name() };
die $@ if $@;
}
## generators
sub generate_accessor_method {
- my $attr = (shift)->associated_attribute;
+ my $attr = (shift)->associated_attribute;
return sub {
$attr->set_value($_[0], $_[1]) if scalar(@_) == 2;
$attr->get_value($_[0]);
}
sub generate_reader_method {
- my $attr = (shift)->associated_attribute;
- return sub {
+ my $attr = (shift)->associated_attribute;
+ return sub {
confess "Cannot assign a value to a read-only accessor" if @_ > 1;
$attr->get_value($_[0]);
- };
+ };
}
sub generate_writer_method {
- my $attr = (shift)->associated_attribute;
+ my $attr = (shift)->associated_attribute;
return sub {
$attr->set_value($_[0], $_[1]);
};
}
sub generate_predicate_method {
- my $attr = (shift)->associated_attribute;
- return sub {
+ my $attr = (shift)->associated_attribute;
+ return sub {
$attr->has_value($_[0])
};
}
sub generate_clearer_method {
- my $attr = (shift)->associated_attribute;
- return sub {
+ my $attr = (shift)->associated_attribute;
+ return sub {
$attr->clear_value($_[0])
};
}
sub generate_accessor_method_inline {
- my $attr = (shift)->associated_attribute;
+ my $attr = (shift)->associated_attribute;
my $attr_name = $attr->name;
my $meta_instance = $attr->associated_class->instance_metaclass;
}
sub generate_reader_method_inline {
- my $attr = (shift)->associated_attribute;
+ my $attr = (shift)->associated_attribute;
my $attr_name = $attr->name;
my $meta_instance = $attr->associated_class->instance_metaclass;
}
sub generate_writer_method_inline {
- my $attr = (shift)->associated_attribute;
+ my $attr = (shift)->associated_attribute;
my $attr_name = $attr->name;
my $meta_instance = $attr->associated_class->instance_metaclass;
sub generate_predicate_method_inline {
- my $attr = (shift)->associated_attribute;
+ my $attr = (shift)->associated_attribute;
my $attr_name = $attr->name;
my $meta_instance = $attr->associated_class->instance_metaclass;
- my $code = eval 'sub {'
- . 'defined ' . $meta_instance->inline_get_slot_value('$_[0]', "'$attr_name'") . ' ? 1 : 0'
+ my $code = eval 'sub {' .
+ $meta_instance->inline_is_slot_initialized('$_[0]', "'$attr_name'")
. '}';
confess "Could not generate inline predicate because : $@" if $@;
}
sub generate_clearer_method_inline {
- my $attr = (shift)->associated_attribute;
+ my $attr = (shift)->associated_attribute;
my $attr_name = $attr->name;
my $meta_instance = $attr->associated_class->instance_metaclass;
=pod
-=head1 NAME
+=head1 NAME
Class::MOP::Method::Accessor - Method Meta Object for accessors
is_inline => 1,
accessor_type => 'reader',
);
-
+
$reader->body->($instance); # call the reader method
=head1 DESCRIPTION
-This is a C<Class::MOP::Method> subclass which is used interally
-by C<Class::MOP::Attribute> to generate accessor code. It can
-handle generation of readers, writers, predicate and clearer
+This is a C<Class::MOP::Method> subclass which is used interally
+by C<Class::MOP::Attribute> to generate accessor code. It can
+handle generation of readers, writers, predicate and clearer
methods, both as closures and as more optimized inline methods.
=head1 METHODS
=item B<new (%options)>
-This creates the method based on the criteria in C<%options>,
+This creates the method based on the criteria in C<%options>,
these options are:
=over 4
=item I<attribute>
-This must be an instance of C<Class::MOP::Attribute> which this
+This must be an instance of C<Class::MOP::Attribute> which this
accessor is being generated for. This paramter is B<required>.
=item I<accessor_type>
-This is a string from the following set; reader, writer, accessor,
-predicate or clearer. This is used to determine which type of
+This is a string from the following set; reader, writer, accessor,
+predicate or clearer. This is used to determine which type of
method is to be generated.
=item I<is_inline>
=item B<initialize_body>
-This will actually generate the method based on the specified
+This will actually generate the method based on the specified
criteria passed to the constructor.
=back
=head2 Method Generators
-These methods will generate appropriate code references for
-the various types of accessors which are supported by
+These methods will generate appropriate code references for
+the various types of accessors which are supported by
C<Class::MOP::Attribute>. The names pretty much explain it all.
=over 4
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.
+it under the same terms as Perl itself.
=cut