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 
12 // using days = duration<signed integer type of at least 25 bits, ratio_multiply<ratio<24>, hours::period>>;
13 
14 #include <chrono>
15 #include <limits>
16 #include <ratio>
17 #include <type_traits>
18 
19 #include "test_macros.h"
20 
21 int main(int, char**)
22 {
23     typedef std::chrono::days D;
24     typedef D::rep Rep;
25     typedef D::period Period;
26     static_assert(std::is_signed<Rep>::value, "");
27     static_assert(std::is_integral<Rep>::value, "");
28     static_assert(std::numeric_limits<Rep>::digits >= 25, "");
29     static_assert(std::is_same_v<Period, std::ratio_multiply<std::ratio<24>, std::chrono::hours::period>>, "");
30 
31   return 0;
32 }
33