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 month_day_last;
13 
14 // constexpr bool ok() const noexcept;
15 //  Returns: m_.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 month_day_last = std::chrono::month_day_last;
27 
28     ASSERT_NOEXCEPT(                std::declval<const month_day_last>().ok());
29     ASSERT_SAME_TYPE(bool, decltype(std::declval<const month_day_last>().ok()));
30 
31     static_assert(!month_day_last{month{}}.ok(),          "");
32     static_assert( month_day_last{std::chrono::May}.ok(), "");
33 
34     for (unsigned i = 1; i <= 12; ++i)
35     {
36         month_day_last mdl{month{i}};
37         assert( mdl.ok());
38     }
39 
40 //  If the month is not ok, all the days are bad
41     for (unsigned i = 13; i <= 50; ++i)
42     {
43         month_day_last mdl{month{i}};
44         assert(!mdl.ok());
45     }
46 }
47