1 package Class::MOP::Mixin::AttributeCore;
6 use Scalar::Util 'blessed';
8 use base 'Class::MOP::Mixin';
10 sub has_accessor { defined $_[0]->{'accessor'} }
11 sub has_reader { defined $_[0]->{'reader'} }
12 sub has_writer { defined $_[0]->{'writer'} }
13 sub has_predicate { defined $_[0]->{'predicate'} }
14 sub has_clearer { defined $_[0]->{'clearer'} }
15 sub has_builder { defined $_[0]->{'builder'} }
16 sub has_init_arg { defined $_[0]->{'init_arg'} }
17 sub has_default { exists $_[0]->{'default'} }
18 sub has_initializer { defined $_[0]->{'initializer'} }
19 sub has_insertion_order { defined $_[0]->{'insertion_order'} }
21 sub _set_insertion_order { $_[0]->{'insertion_order'} = $_[1] }
23 sub has_read_method { $_[0]->has_reader || $_[0]->has_accessor }
24 sub has_write_method { $_[0]->has_writer || $_[0]->has_accessor }
26 sub is_default_a_coderef {
27 # Uber hack because it is called from CMOP::Attribute constructor as
28 # $class->is_default_a_coderef(\%options)
29 my ($value) = ref $_[0] ? $_[0]->{'default'} : $_[1]->{'default'};
31 return unless ref($value);
33 return ref($value) eq 'CODE'
34 || ( blessed($value) && $value->isa('Class::MOP::Method') );
38 my ( $self, $instance ) = @_;
39 if ( defined $instance && $self->is_default_a_coderef ) {
40 # if the default is a CODE ref, then we pass in the instance and
41 # default can return a value based on that instance. Somewhat crude,
43 return $self->{'default'}->($instance);
50 # ABSTRACT: Core attributes shared by attribute metaclasses
58 This class implements the core attributes (aka properties) shared by all
59 attributes. See the L<Class::MOP::Attribute> documentation for API details.