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++03, c++11, c++14, c++17
9
10 // <chrono>
11 // class year_month;
12
13 // constexpr bool ok() const noexcept;
14 // Returns: m_.ok() && y_.ok().
15
16 #include <chrono>
17 #include <type_traits>
18 #include <cassert>
19
20 #include "test_macros.h"
21
main(int,char **)22 int main(int, char**)
23 {
24 using month = std::chrono::month;
25 using year = std::chrono::year;
26 using year_month = std::chrono::year_month;
27
28 constexpr month January = std::chrono::January;
29
30 ASSERT_NOEXCEPT( std::declval<const year_month>().ok());
31 ASSERT_SAME_TYPE(bool, decltype(std::declval<const year_month>().ok()));
32
33 static_assert(!year_month{year{-32768}, January}.ok(), ""); // Bad year
34 static_assert(!year_month{year{2019}, month{}}.ok(), ""); // Bad month
35 static_assert( year_month{year{2019}, January}.ok(), ""); // Both OK
36
37 for (unsigned i = 0; i <= 50; ++i)
38 {
39 year_month ym{year{2019}, month{i}};
40 assert( ym.ok() == month{i}.ok());
41 }
42
43 const int ymax = static_cast<int>(year::max());
44 for (int i = ymax - 100; i <= ymax + 100; ++i)
45 {
46 year_month ym{year{i}, January};
47 assert( ym.ok() == year{i}.ok());
48 }
49
50 return 0;
51 }
52