ENSURE_EIGENCLASS  501 class.c        	SET_METACLASS_OF(metaclass, ENSURE_EIGENCLASS(tmp));
ENSURE_EIGENCLASS  506 class.c            RCLASS_SET_SUPER(metaclass, super ? ENSURE_EIGENCLASS(super) : rb_cClass);
ENSURE_EIGENCLASS 1665 class.c            if (RB_TYPE_P(obj, T_CLASS)) (void)ENSURE_EIGENCLASS(klass);