1 // PR c++/33239 2 3 struct null_type; 4 5 template<typename T1, typename T2> 6 struct tuple_impl 7 { 8 template<typename U> 9 struct append 10 { 11 typedef tuple_impl<U, null_type> type; 12 }; 13 14 int data; 15 }; 16 17 template<typename T1> 18 class tuple 19 : public tuple_impl<T1, null_type>::template append<T1>::type 20 { 21 using tuple_impl<T1, null_type>::template append<T1>::type::data; 22 }; 23 24 tuple<int> my_tuple; 25