1 // { dg-do compile { target c++11 } } 2 template<typename... Args> struct tuple1 { }; 3 template<typename... Args> struct tuple2 { }; 4 5 template<typename T, typename U> 6 struct same_tuple_args { 7 static const bool value = false; 8 }; 9 10 template<typename... Args> 11 struct same_tuple_args<tuple1<Args...>, tuple2<Args...> > { 12 static const bool value = true; 13 }; 14 15 int same0[same_tuple_args<tuple1<>, tuple2<> >::value? 1 : -1]; 16 int same1[same_tuple_args<tuple1<int>, tuple2<int> >::value? 1 : -1]; 17 int same2[same_tuple_args<tuple1<float, int>, tuple2<float, int> >::value? 1 : -1]; 18 int diff0[!same_tuple_args<tuple1<>, tuple2<int> >::value? 1 : -1]; 19 int diff1[!same_tuple_args<tuple1<int, float>, tuple2<float, int> >::value? 1 : -1]; 20