1 // { dg-do compile { target c++11 } } 2 3 class C; 4 struct S; 5 union U; 6 enum e {}; 7 enum [[gnu::unused]] e; // { dg-warning "already defined" } 8 9 struct [[gnu::unused]] B *p; // { dg-warning "attributes" } 10 11 template <class T> struct A { }; 12 struct [[gnu::unused]] A<int>; // { dg-warning "attributes" } 13