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 weekday_indexed;
12 
13 // constexpr unsigned index() const noexcept;
14 //  Returns: index_
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 weekday         = std::chrono::weekday;
25     using weekday_indexed = std::chrono::weekday_indexed;
26 
27     ASSERT_NOEXCEPT(                    std::declval<const weekday_indexed>().index());
28     ASSERT_SAME_TYPE(unsigned, decltype(std::declval<const weekday_indexed>().index()));
29 
30     static_assert( weekday_indexed{}.index() == 0, "");
31 
32     for (unsigned i = 1; i <= 5; ++i)
33     {
34         weekday_indexed wdi(weekday{2}, i);
35         assert( static_cast<unsigned>(wdi.index()) == i);
36     }
37 
38   return 0;
39 }
40