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 
9 // UNSUPPORTED: c++03, c++11, c++14
10 // <chrono>
11 
12 // round
13 
14 // template <class ToDuration, class Rep, class Period>
15 //   constexpr
16 //   ToDuration
17 //   ceil(const duration<Rep, Period>& d);
18 
19 #include <chrono>
20 #include <type_traits>
21 #include <cassert>
22 
23 #include "test_macros.h"
24 
25 template <class ToDuration, class FromDuration>
26 void
27 test(const FromDuration& f, const ToDuration& d)
28 {
29     {
30     typedef decltype(std::chrono::round<ToDuration>(f)) R;
31     static_assert((std::is_same<R, ToDuration>::value), "");
32     assert(std::chrono::round<ToDuration>(f) == d);
33     }
34 }
35 
36 int main(int, char**)
37 {
38 //  7290000ms is 2 hours, 1 minute, and 30 seconds
39     test(std::chrono::milliseconds( 7290000), std::chrono::hours( 2));
40     test(std::chrono::milliseconds(-7290000), std::chrono::hours(-2));
41     test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 122));
42     test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-122));
43 
44     {
45 //  9000000ms is 2 hours and 30 minutes
46     constexpr std::chrono::hours h1 = std::chrono::round<std::chrono::hours>(std::chrono::milliseconds(9000000));
47     static_assert(h1.count() == 2, "");
48     constexpr std::chrono::hours h2 = std::chrono::round<std::chrono::hours>(std::chrono::milliseconds(-9000000));
49     static_assert(h2.count() == -2, "");
50     }
51 
52   return 0;
53 }
54