1 // PR c++/54744 2 3 template <typename T> 4 struct base { 5 typedef base base_type; 6 }; 7 8 template <typename T> 9 struct derived : base<T> { 10 typedef typename derived::base_type::base_type base_type; derivedderived11 derived() : base_type() {} 12 }; 13