30         auto opt = std::make_optional(arr);  in main()  local
31         ASSERT_SAME_TYPE(decltype(opt), std::optional<int*>);  in main()
32         assert(*opt == arr);  in main()
35         constexpr auto opt = std::make_optional(2);  in main()  local
36         ASSERT_SAME_TYPE(decltype(opt), const std::optional<int>);  in main()
37         static_assert(opt.value() == 2);  in main()
40         auto opt = std::make_optional(2);  in main()  local
41         ASSERT_SAME_TYPE(decltype(opt), std::optional<int>);  in main()
42         assert(*opt == 2);  in main()
46         auto opt = std::make_optional(s);  in main()  local
47         ASSERT_SAME_TYPE(decltype(opt), std::optional<std::string>);  in main()
48         assert(*opt == "123");  in main()
52         auto opt = std::make_optional(std::move(s));  in main()  local
53         ASSERT_SAME_TYPE(decltype(opt), std::optional<std::unique_ptr<int>>);  in main()
54         assert(**opt == 3);  in main()