libcxx/test/std/time/time.traits/time.traits.specializations/time_point.pass.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-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
  23 template <class D1, class D2, class De>
  24 void
  25 test()
  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
  35 int 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 }