implement Class.new in C again

mrblib/class.rb

@@ -4,11 +4,6 @@ class Class
     obj.initialize(*args,&b)
     obj
   end
-  def self.new(*args)
-    obj = super
-    obj.inherited
-    obj
-  end
 end
 
 class Module

src/class.c

@@ -1055,6 +1055,20 @@ mrb_obj_new(mrb_state *mrb, struct RClass *c, int argc, mrb_value *argv)
   return obj;
 }
 
+static mrb_value
+mrb_class_new_class(mrb_state *mrb, mrb_value cv)
+{
+  mrb_value super;
+  struct RClass *new_class;
+ 
+  if (mrb_get_args(mrb, "|o", &super) == 0) {
+    super = mrb_obj_value(mrb->object_class);
+  }
+  new_class = mrb_class_new(mrb, mrb_class_ptr(super));
+  mrb_funcall(mrb, super, "inherited", 1, mrb_obj_value(new_class));
+  return mrb_obj_value(new_class);
+}
+
 mrb_value
 mrb_class_superclass(mrb_state *mrb, mrb_value klass)
 {
@@ -1871,8 +1885,9 @@ mrb_init_class(mrb_state *mrb)
   mrb_define_method(mrb, bob, "!",                       mrb_bob_not,              MRB_ARGS_NONE());
   mrb_define_method(mrb, bob, "method_missing",          mrb_bob_missing,          MRB_ARGS_ANY());  /* 15.3.1.3.30 */
 
-  mrb_define_method(mrb, cls, "superclass",              mrb_class_superclass,     MRB_ARGS_NONE()); /* 15.2.3.3.4 */
+  mrb_define_class_method(mrb, cls, "new",               mrb_class_new_class,      MRB_ARGS_ANY());
   mrb_define_method(mrb, cls, "alloc",                   mrb_instance_alloc,       MRB_ARGS_NONE());
+  mrb_define_method(mrb, cls, "superclass",              mrb_class_superclass,     MRB_ARGS_NONE()); /* 15.2.3.3.4 */
   mrb_define_method(mrb, cls, "new",                     mrb_instance_new,         MRB_ARGS_ANY());  /* 15.2.3.3.3 */
   mrb_define_method(mrb, cls, "inherited",               mrb_bob_init,             MRB_ARGS_REQ(1));