2 // { dg-do compile { target c++14 } }
6 null_node(const null_node&);
12 auto get() { return null; }
14 template <typename... Ts>
15 struct inheritor: Ts...
17 inheritor(const inheritor& outer)
24 extern inheritor<null_node> example;
25 inheritor<null_node> result(example);