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);