1 // PR c++/68965 2 // { dg-do compile { target c++14 } } 3 // { dg-options "-Wall -Wextra" } 4 5 auto count = [](auto&&... xs) // { dg-warning "unused parameter" } 6 { 7 }; 8 9 struct count_struct 10 { 11 template<typename... Ts> operatorcount_struct12 auto operator()(Ts&&... xs) // { dg-warning "unused parameter" } 13 { 14 } 15 }; 16 main()17int main() 18 { 19 count(1,2,3); 20 count_struct{}(1,2,3); 21 } 22