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
13 // using years = duration<signed integer type of at least 17 bits, ratio_multiply<ratio<146097, 400>, days::period>>
14
15 #include <chrono>
16 #include <type_traits>
17 #include <limits>
18
main()19 int main()
20 {
21 typedef std::chrono::years D;
22 typedef D::rep Rep;
23 typedef D::period Period;
24 static_assert(std::is_signed<Rep>::value, "");
25 static_assert(std::is_integral<Rep>::value, "");
26 static_assert(std::numeric_limits<Rep>::digits >= 17, "");
27 static_assert(std::is_same_v<Period, std::ratio_multiply<std::ratio<146097, 400>, std::chrono::days::period>>, "");
28 }
29