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
25template <class Duration>
26void
27test(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
36int main(int, char**)
37{
38// 7290000ms is 2 hours, 1 minute, and 30 seconds
39 test(f: std::chrono::milliseconds( 7290000), d: std::chrono::milliseconds( 7290000));
40 test(f: std::chrono::milliseconds(-7290000), d: std::chrono::milliseconds( 7290000));
41 test(f: std::chrono::minutes( 122), d: std::chrono::minutes( 122));
42 test(f: std::chrono::minutes(-122), d: std::chrono::minutes( 122));
43 test(f: std::chrono::hours(0), d: std::chrono::hours(0));
44
45 {
46// 9000000ms is 2 hours and 30 minutes
47 constexpr std::chrono::hours h1 = std::chrono::abs(d: std::chrono::hours(-3));
48 static_assert(h1.count() == 3, "");
49 constexpr std::chrono::hours h2 = std::chrono::abs(d: 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(d: std::chrono::duration<int, std::ratio<60, 100>>{2});
56 static_assert(d.count() == 2, "");
57 }
58
59 return 0;
60}
61

source code of libcxx/test/std/time/time.duration/time.duration.alg/abs.pass.cpp