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
11 // <chrono>
12
13 // abs
14
15 // template <class Rep, class Period>
16 // constexpr duration<Rep, Period> abs(duration<Rep, Period> d)
17
18 #include <chrono>
19 #include <cassert>
20 #include <ratio>
21 #include <type_traits>
22
23 #include "test_macros.h"
24
25 template <class Duration>
26 void
test(const Duration & f,const Duration & d)27 test(const Duration& f, const Duration& d)
28 {
29 {
30 typedef decltype(std::chrono::abs(f)) R;
31 static_assert((std::is_same<R, Duration>::value), "");
32 assert(std::chrono::abs(f) == d);
33 }
34 }
35
main(int,char **)36 int main(int, char**)
37 {
38 // 7290000ms is 2 hours, 1 minute, and 30 seconds
39 test(std::chrono::milliseconds( 7290000), std::chrono::milliseconds( 7290000));
40 test(std::chrono::milliseconds(-7290000), std::chrono::milliseconds( 7290000));
41 test(std::chrono::minutes( 122), std::chrono::minutes( 122));
42 test(std::chrono::minutes(-122), std::chrono::minutes( 122));
43 test(std::chrono::hours(0), std::chrono::hours(0));
44
45 {
46 // 9000000ms is 2 hours and 30 minutes
47 constexpr std::chrono::hours h1 = std::chrono::abs(std::chrono::hours(-3));
48 static_assert(h1.count() == 3, "");
49 constexpr std::chrono::hours h2 = std::chrono::abs(std::chrono::hours(3));
50 static_assert(h2.count() == 3, "");
51 }
52
53 {
54 // Make sure it works for durations that are not LCD'ed - example from LWG3091
55 constexpr auto d = std::chrono::abs(std::chrono::duration<int, std::ratio<60, 100>>{2});
56 static_assert(d.count() == 2, "");
57 }
58
59 return 0;
60 }
61