52 lines · cpp
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-exception6//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>24void25test()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