| // PR c++/99650 |
| // { dg-do compile { target c++17 } } |
| |
| namespace std { |
| template<typename T> struct tuple_size; |
| template<int, typename> struct tuple_element; |
| } |
| |
| struct A { |
| int i; |
| template <int I> void get() { } |
| }; |
| |
| template<> struct std::tuple_size<A> { static const int value = 2; }; |
| template<int I> struct std::tuple_element<I,A> { using type = void; }; |
| |
| A a = { 42 }; |
| auto [ x, y ] = a; // { dg-error ".std::tuple_element<0, A>::type. is .void." } |
| // { dg-message "in initialization of structured binding variable 'x'" "" { target *-*-* } .-1 } |
