| // PR c++/105003 |
| // { dg-do compile { target c++11 } } |
| |
| template <class T> struct A; |
| template <class T, class U> struct B { }; |
| template <class... Ts> struct C { }; |
| |
| // Fn is not complex, since T is used outside the pack expansion, so the two |
| // partial specializations are equivalent. |
| template <class T, class... Ts> using Fn = T(Ts...); |
| template <class T, class... Ts> struct A<Fn<T,Ts...>*> { }; |
| template <class T, class... Ts> struct A<T(*)(Ts...)> { }; // { dg-error "redefinition" } |
| |
| // CB is complex, since T is only used in the pack expansion, so the two |
| // partial specializations are functionally equivalent but not equivalent. |
| template <class T, class ...Ts> using CB = C<B<T,Ts>...>; |
| template <class T, class ...Ts> struct A<CB<T,Ts...>*> { }; |
| template <class T, class ...Ts> struct A<C<B<T,Ts>...>*> { }; // IFNDR |
| A<C<B<int,int>>*> a; // { dg-error "ambiguous" } |
| // { dg-prune-output "incomplete" } |