1 files changed, 123 insertions, 0 deletions
diff --git a/lib/Moose/Meta/Class/Immutable/Trait.pm b/lib/Moose/Meta/Class/Immutable/Trait.pm
new file mode 100644
index 0000000..8dba57a
--- /dev/null
+++ b/lib/Moose/Meta/Class/Immutable/Trait.pm
@@ -0,0 +1,123 @@
+package Moose::Meta::Class::Immutable::Trait;
+our $VERSION = '2.1405';
+
+use strict;
+use warnings;
+
+use Class::MOP;
+use Scalar::Util qw( blessed );
+
+use parent 'Class::MOP::Class::Immutable::Trait';
+
+use Moose::Util 'throw_exception';
+
+sub add_role { $_[1]->_immutable_cannot_call }
+
+sub calculate_all_roles {
+    my $orig = shift;
+    my $self = shift;
+    @{ $self->{__immutable}{calculate_all_roles} ||= [ $self->$orig ] };
+}
+
+sub calculate_all_roles_with_inheritance {
+    my $orig = shift;
+    my $self = shift;
+    @{ $self->{__immutable}{calculate_all_roles_with_inheritance} ||= [ $self->$orig ] };
+}
+
+sub does_role {
+    shift;
+    my $self = shift;
+    my $role = shift;
+
+    (defined $role)
+        || throw_exception( RoleNameRequired => class_name => $self->name );
+
+    $self->{__immutable}{does_role} ||= { map { $_->name => 1 } $self->calculate_all_roles_with_inheritance };
+
+    my $name = blessed $role ? $role->name : $role;
+
+    return $self->{__immutable}{does_role}{$name};
+}
+
+1;
+
+# ABSTRACT: Implements immutability for metaclass objects
+
+__END__
+
+=pod
+
+=encoding UTF-8
+
+=head1 NAME
+
+Moose::Meta::Class::Immutable::Trait - Implements immutability for metaclass objects
+
+=head1 VERSION
+
+version 2.1405
+
+=head1 DESCRIPTION
+
+This class makes some Moose-specific metaclass methods immutable. This
+is deep guts.
+
+=head1 BUGS
+
+See L<Moose/BUGS> for details on reporting bugs.
+
+=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