libcxx/test/std/time/time.point/time.point.nonmember/op_-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 // time_point
  12
  13 // template <class Clock, class Duration1, class Duration2>
  14 //   typename common_type<Duration1, Duration2>::type
  15 //   operator-(const time_point<Clock, Duration1>& lhs, const time_point<Clock, Duration2>& rhs);
  16
  17 #include <chrono>
  18 #include <cassert>
  19
  20 #include "test_macros.h"
  21
  22 int main(int, char**)
  23 {
  24     typedef std::chrono::system_clock Clock;
  25     typedef std::chrono::milliseconds Duration1;
  26     typedef std::chrono::microseconds Duration2;
  27     {
  28     std::chrono::time_point<Clock, Duration1> t1(Duration1(3));
  29     std::chrono::time_point<Clock, Duration2> t2(Duration2(5));
  30     assert((t1 - t2) == Duration2(2995));
  31     }
  32 #if TEST_STD_VER > 11
  33     {
  34     constexpr std::chrono::time_point<Clock, Duration1> t1(Duration1(3));
  35     constexpr std::chrono::time_point<Clock, Duration2> t2(Duration2(5));
  36     static_assert((t1 - t2) == Duration2(2995), "");
  37     }
  38 #endif
  39
  40   return 0;
  41 }