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// { dg-do compile { target c++11 } } class C; struct S; union U; enum e {}; enum [[gnu::unused]] e; // { dg-warning "already defined" } struct [[gnu::unused]] B *p; // { dg-warning "attributes" } template <class T> struct A { }; struct [[gnu::unused]] A<int>; // { dg-warning "attributes" }