7 lines · c
1template<typename, typename = int> struct A;2template<typename T> struct B;3 4template<typename, typename> struct A {};5template<typename T> struct B : A<T> {};6template<typename T> inline auto C(T) {}7 1template<typename, typename = int> struct A;2template<typename T> struct B;3 4template<typename, typename> struct A {};5template<typename T> struct B : A<T> {};6template<typename T> inline auto C(T) {}7