| // PR c++/94490 |
| // { dg-do compile { target c++14 } } |
| |
| template<class T> |
| constexpr int fake_tuple_size_v = 3; |
| template<int...> struct intseq {}; |
| |
| // So that it compiles with clang++. |
| #if __has_builtin(__make_integer_seq) |
| using size_t = decltype(sizeof(1)); |
| template<typename, size_t... _Indices> |
| using _IdxTuple = intseq<_Indices...>; |
| |
| template<int N> using genseq = __make_integer_seq<_IdxTuple, size_t, N>; |
| #else |
| template<int N> using genseq = intseq<__integer_pack(N)...>; |
| #endif |
| |
| template<int A, class S = genseq<0 ? A : A>> |
| struct arith_result |
| { }; |
| |
| template<typename T> |
| auto Mul(const T&) |
| { |
| return [](auto) { return arith_result<fake_tuple_size_v<T>> { }; }(0); |
| } |
| |
| auto x = Mul(0); |
