types.pass.cpp revision 01afa5c6e407e985d9643707d7b7ab1384bd9317 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <optional>
11
12// template <class T>
13// class optional
14// {
15// public:
16//     typedef T value_type;
17//     ...
18
19#include <optional>
20#include <type_traits>
21
22#if _LIBCPP_STD_VER > 11
23
24template <class Opt, class T>
25void
26test()
27{
28    static_assert(std::is_same<typename Opt::value_type, T>::value, "");
29}
30
31#endif  // _LIBCPP_STD_VER > 11
32
33int main()
34{
35#if _LIBCPP_STD_VER > 11
36    test<std::optional<int>, int>();
37    test<std::optional<const int>, const int>();
38    test<std::optional<double>, double>();
39    test<std::optional<const double>, const double>();
40#endif  // _LIBCPP_STD_VER > 11
41}
42