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// <chrono>
10
11// template <class Clock, class Duration1, class Duration2>
12// struct common_type<chrono::time_point<Clock, Duration1>, chrono::time_point<Clock, Duration2>>
13// {
14// typedef chrono::time_point<Clock, typename common_type<Duration1, Duration2>::type> type;
15// };
16
17#include <chrono>
18#include <ratio>
19#include <type_traits>
20
21#include "test_macros.h"
22
23template <class D1, class D2, class De>
24void
25test()
26{
27 typedef std::chrono::system_clock C;
28 typedef std::chrono::time_point<C, D1> T1;
29 typedef std::chrono::time_point<C, D2> T2;
30 typedef std::chrono::time_point<C, De> Te;
31 typedef typename std::common_type<T1, T2>::type Tc;
32 static_assert((std::is_same<Tc, Te>::value), "");
33}
34
35int main(int, char**)
36{
37 test<std::chrono::duration<int, std::ratio<1, 100> >,
38 std::chrono::duration<long, std::ratio<1, 1000> >,
39 std::chrono::duration<long, std::ratio<1, 1000> > >();
40 test<std::chrono::duration<long, std::ratio<1, 100> >,
41 std::chrono::duration<int, std::ratio<1, 1000> >,
42 std::chrono::duration<long, std::ratio<1, 1000> > >();
43 test<std::chrono::duration<char, std::ratio<1, 30> >,
44 std::chrono::duration<short, std::ratio<1, 1000> >,
45 std::chrono::duration<int, std::ratio<1, 3000> > >();
46 test<std::chrono::duration<double, std::ratio<21, 1> >,
47 std::chrono::duration<short, std::ratio<15, 1> >,
48 std::chrono::duration<double, std::ratio<3, 1> > >();
49
50 return 0;
51}
52

source code of libcxx/test/std/time/time.traits/time.traits.specializations/time_point.pass.cpp