1 | //===----------------------------------------------------------------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | // UNSUPPORTED: c++03, c++11, c++14 |
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 | #include "test_macros.h" |
23 | |
24 | using std::optional; |
25 | |
26 | template <class Opt, class T> |
27 | void |
28 | test() |
29 | { |
30 | static_assert(std::is_same<typename Opt::value_type, T>::value, "" ); |
31 | } |
32 | |
33 | int main(int, char**) |
34 | { |
35 | test<optional<int>, int>(); |
36 | test<optional<const int>, const int>(); |
37 | test<optional<double>, double>(); |
38 | test<optional<const double>, const double>(); |
39 | |
40 | return 0; |
41 | } |
42 | |