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 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
10
11 // <chrono>
12 // class year_month;
13
14 // constexpr bool ok() const noexcept;
15 // Returns: m_.ok() && y_.ok().
16
17 #include <chrono>
18 #include <type_traits>
19 #include <cassert>
20
21 #include "test_macros.h"
22
main()23 int main()
24 {
25 using month = std::chrono::month;
26 using year = std::chrono::year;
27 using year_month = std::chrono::year_month;
28
29 constexpr month January = std::chrono::January;
30
31 ASSERT_NOEXCEPT( std::declval<const year_month>().ok());
32 ASSERT_SAME_TYPE(bool, decltype(std::declval<const year_month>().ok()));
33
34 static_assert(!year_month{year{-32768}, January}.ok(), ""); // Bad year
35 static_assert(!year_month{year{2019}, month{}}.ok(), ""); // Bad month
36 static_assert( year_month{year{2019}, January}.ok(), ""); // Both OK
37
38 for (unsigned i = 0; i <= 50; ++i)
39 {
40 year_month ym{year{2019}, month{i}};
41 assert( ym.ok() == month{i}.ok());
42 }
43
44 const int ymax = static_cast<int>(year::max());
45 for (int i = ymax - 100; i <= ymax + 100; ++i)
46 {
47 year_month ym{year{i}, January};
48 assert( ym.ok() == year{i}.ok());
49 }
50 }
51