1 // PR c++/57626 2 // { dg-do compile { target c++11 } } 3 4 struct symbol_set{}; 5 6 template <typename T, template <typename ...> class TT, typename ... Args> 7 using bar = void(T::*)(TT<Args...> &, const symbol_set &); 8 9 struct converter 10 { 11 template <typename Term, typename ... Args, 12 typename = decltype(bar<Term,Args...>(&Term::multiply))> // { dg-error "pack expansion" } 13 converter(const Term &); 14 }; 15