569   function $allocate_class(name, superclass, singleton) {  argument
572     if (superclass != null && superclass.$$bridge) {
577             self = new ($bind.apply(superclass.$$constructor, [null].concat(args)))();
597     $prop(klass, '$$super', superclass);
615     if (superclass != null) {
616       $set_proto(klass.$$prototype, superclass.$$prototype);
624           for (i = 0; i < superclass.$$subclasses.length; i++) {
625             subclass = superclass.$$subclasses[i];
632           superclass.$$subclasses = rebuilt_subclasses;
635           superclass.$$subclasses.push(klass);
639       if (superclass.$$meta) {
665   function ensureSuperclassMatch(klass, superclass) {  argument
666     if (klass.$$super !== superclass) {
671   Opal.klass = function(scope, superclass, name) {  argument
684       superclass != null && (!superclass.hasOwnProperty || (
685         superclass.hasOwnProperty && !superclass.hasOwnProperty('$$is_class')
688       if (superclass.constructor && superclass.constructor.name == "Function") {
689         bridged = superclass;
690         superclass = _Object;
693 …      (superclass.constructor && (superclass.constructor.name || superclass.constructor.$$name)) ||
694           typeof(superclass)
702       if (superclass) {
704         ensureSuperclassMatch(klass, superclass);
711       if (superclass == null) {
712         superclass = _Object;
716       klass = $allocate_class(name, superclass);
720       if (superclass.$inherited) {
721         superclass.$inherited(klass);
877     var superclass = klass === BasicObject ? Class : Opal.get_singleton_class(klass.$$super);
879     var meta = $allocate_class(null, superclass, true);
911     var superclass = object.$$class,
912         klass = $allocate_class(nil, superclass, true);
4283     $defs(self, '$new', function $Class_new$1(superclass) {  argument
4289       if (superclass == null) superclass = $$('Object');
4291       if (!superclass.$$is_class) {
4295       var klass = Opal.allocate_class(nil, superclass);
4296       superclass.$inherited(klass);