27     std::optional opt(5);  in main()  local
28     ASSERT_SAME_TYPE(decltype(opt), std::optional<int>);  in main()
29     assert(static_cast<bool>(opt));  in main()
30     assert(*opt == 5);  in main()
35     std::optional opt(A{});  in main()  local
36     ASSERT_SAME_TYPE(decltype(opt), std::optional<A>);  in main()
37     assert(static_cast<bool>(opt));  in main()
43     std::optional opt(source);  in main()  local
44     ASSERT_SAME_TYPE(decltype(opt), std::optional<int>);  in main()
45     assert(static_cast<bool>(opt));  in main()
46     assert(*opt == 5);  in main()
52     std::optional opt(source);  in main()  local
53     ASSERT_SAME_TYPE(decltype(opt), std::optional<const int*>);  in main()
54     assert(static_cast<bool>(opt));  in main()
55     assert(*opt == nullptr);  in main()
61     std::optional opt(source);  in main()  local
62     ASSERT_SAME_TYPE(decltype(opt), std::optional<int*>);  in main()
63     assert(static_cast<bool>(opt));  in main()
64     assert((*opt)[0] == 1);  in main()
71     std::optional opt(source);  in main()  local
72     ASSERT_SAME_TYPE(decltype(opt), std::optional<char>);  in main()
73     assert(static_cast<bool>(opt) == static_cast<bool>(source));  in main()
74     assert(*opt == *source);  in main()