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 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
9
10 // <chrono>
11 // class year;
12
13 // constexpr year operator+() const noexcept;
14 // constexpr year operator-() const noexcept;
15
16 #include <chrono>
17 #include <type_traits>
18 #include <cassert>
19
20 #include "test_macros.h"
21
22 template <typename Y>
testConstexpr()23 constexpr bool testConstexpr()
24 {
25 Y y1{1};
26 if (static_cast<int>(+y1) != 1) return false;
27 if (static_cast<int>(-y1) != -1) return false;
28 return true;
29 }
30
main(int,char **)31 int main(int, char**)
32 {
33 using year = std::chrono::year;
34
35 ASSERT_NOEXCEPT(+std::declval<year>());
36 ASSERT_NOEXCEPT(-std::declval<year>());
37
38 ASSERT_SAME_TYPE(year, decltype(+std::declval<year>()));
39 ASSERT_SAME_TYPE(year, decltype(-std::declval<year>()));
40
41 static_assert(testConstexpr<year>(), "");
42
43 for (int i = 10000; i <= 10020; ++i)
44 {
45 year year(i);
46 assert(static_cast<int>(+year) == i);
47 assert(static_cast<int>(-year) == -i);
48 }
49
50 return 0;
51 }
52