1 files changed, 125 insertions, 0 deletions
diff --git a/lib/Class/MOP/Mixin/AttributeCore.pm b/lib/Class/MOP/Mixin/AttributeCore.pm
new file mode 100644
index 0000000..9c96c6c
--- /dev/null
+++ b/lib/Class/MOP/Mixin/AttributeCore.pm
@@ -0,0 +1,125 @@
+package Class::MOP::Mixin::AttributeCore;
+our $VERSION = '2.1405';
+
+use strict;
+use warnings;
+
+use Scalar::Util 'blessed';
+
+use parent 'Class::MOP::Mixin';
+
+sub has_accessor        { defined $_[0]->{'accessor'} }
+sub has_reader          { defined $_[0]->{'reader'} }
+sub has_writer          { defined $_[0]->{'writer'} }
+sub has_predicate       { defined $_[0]->{'predicate'} }
+sub has_clearer         { defined $_[0]->{'clearer'} }
+sub has_builder         { defined $_[0]->{'builder'} }
+sub has_init_arg        { defined $_[0]->{'init_arg'} }
+sub has_default         { exists  $_[0]->{'default'} }
+sub has_initializer     { defined $_[0]->{'initializer'} }
+sub has_insertion_order { defined $_[0]->{'insertion_order'} }
+
+sub _set_insertion_order { $_[0]->{'insertion_order'} = $_[1] }
+
+sub has_read_method  { $_[0]->has_reader || $_[0]->has_accessor }
+sub has_write_method { $_[0]->has_writer || $_[0]->has_accessor }
+
+sub is_default_a_coderef {
+    # Uber hack because it is called from CMOP::Attribute constructor as
+    # $class->is_default_a_coderef(\%options)
+    my ($value) = ref $_[0] ? $_[0]->{'default'} : $_[1]->{'default'};
+
+    return unless ref($value);
+
+    return ref($value) eq 'CODE'
+        || ( blessed($value) && $value->isa('Class::MOP::Method') );
+}
+
+sub default {
+    my ( $self, $instance ) = @_;
+    if ( defined $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 $self->{'default'}->($instance);
+    }
+    $self->{'default'};
+}
+
+1;
+
+# ABSTRACT: Core attributes shared by attribute metaclasses
+
+__END__
+
+=pod
+
+=encoding UTF-8
+
+=head1 NAME
+
+Class::MOP::Mixin::AttributeCore - Core attributes shared by attribute metaclasses
+
+=head1 VERSION
+
+version 2.1405
+
+=head1 DESCRIPTION
+
+This class implements the core attributes (aka properties) shared by all
+attributes. See the L<Class::MOP::Attribute> documentation for API details.
+
+=head1 AUTHORS
+
+=over 4
+
+=item *
+
+Stevan Little <stevan.little@iinteractive.com>
+
+=item *
+
+Dave Rolsky <autarch@urth.org>
+
+=item *
+
+Jesse Luehrs <doy@tozt.net>
+
+=item *
+
+Shawn M Moore <code@sartak.org>
+
+=item *
+
+יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
+
+=item *
+
+Karen Etheridge <ether@cpan.org>
+
+=item *
+
+Florian Ragwitz <rafl@debian.org>
+
+=item *
+
+Hans Dieter Pearcey <hdp@weftsoar.net>
+
+=item *
+
+Chris Prather <chris@prather.org>
+
+=item *
+
+Matt S Trout <mst@shadowcat.co.uk>
+
+=back
+
+=head1 COPYRIGHT AND LICENSE
+
+This software is copyright (c) 2006 by Infinity Interactive, Inc..
+
+This is free software; you can redistribute it and/or modify it under
+the same terms as the Perl 5 programming language system itself.
+
+=cut