15 struct NoDefault {  struct
16     NoDefault() = delete;
17     NoDefault(NoDefault const&) = default;
18     constexpr explicit NoDefault(int) { }  in NoDefault()  function
22 auto operator==(NoDefault<i> const&, NoDefault<j> const&) { return hana::bool_<i == j>{}; }  in operator ==()
24 auto operator!=(NoDefault<i> const&, NoDefault<j> const&) { return hana::bool_<i != j>{}; }  in operator !=()
40     struct hash_impl<NoDefault<i>> {
41         static constexpr auto apply(NoDefault<i> const&)  in apply()
42         { return hana::type_c<NoDefault<i>>; };  in apply()
63         auto set3 = hana::make_set(Default<0>(int{}), NoDefault<1>(int{}), Default<2>(int{}));  in main()
68         auto set1 = hana::make_set(NoDefault<0>(int{}));  in main()
71         auto set2 = hana::make_set(NoDefault<0>(int{}), NoDefault<1>(int{}));  in main()
74         auto set3 = hana::make_set(NoDefault<0>(int{}), NoDefault<1>(int{}), NoDefault<2>(int{}));  in main()