25   struct is_insertable  struct
36   struct is_insertable<Ostream, T, void_t<insert_result<Ostream, T>>>  struct
57   static_assert(!is_insertable<std::wostream&, X&>::value, "");  in test01()
58   static_assert(!is_insertable<std::wostream&&, X&>::value, "");  in test01()
59   static_assert(!is_insertable<std::wostream&, X&&>::value, "");  in test01()
60   static_assert(!is_insertable<std::wostream&&, X&&>::value, "");  in test01()
61   static_assert(is_insertable<std::wostream&, Y&>::value, "");  in test01()
62   static_assert(is_insertable<std::wostream&&, Y&&>::value, "");  in test01()
63   static_assert(is_insertable<std::wostream&, Y&>::value, "");  in test01()
64   static_assert(is_insertable<std::wostream&&, Y&&>::value, "");  in test01()
65   static_assert(!is_insertable<std::wostream&, Z&>::value, "");  in test01()
66   static_assert(!is_insertable<std::wostream&&, Z&>::value, "");  in test01()
67   static_assert(!is_insertable<std::wostream&, Z&&>::value, "");  in test01()
68   static_assert(!is_insertable<std::wostream&&, Z&&>::value, "");  in test01()