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_weekday;
13 
14 // constexpr chrono::month month() const noexcept;
15 //  Returns: wd_
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_weekday   = std::chrono::month_weekday;
26     using month           = std::chrono::month;
27     using weekday         = std::chrono::weekday;
28     using weekday_indexed = std::chrono::weekday_indexed;
29 
30     constexpr weekday Sunday = std::chrono::Sunday;
31 
32     ASSERT_NOEXCEPT(                 std::declval<const month_weekday>().month());
33     ASSERT_SAME_TYPE(month, decltype(std::declval<const month_weekday>().month()));
34 
35     static_assert( month_weekday{}.month() == month{}, "");
36 
37     for (unsigned i = 1; i <= 50; ++i)
38     {
39         month_weekday md(month{i}, weekday_indexed{Sunday, 1});
40         assert( static_cast<unsigned>(md.month()) == i);
41     }
42 }
43