libcxx/test/std/time/time.point/time.point.cons/convert.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 Duration2>
  14 //   time_point(const time_point<clock, Duration2>& t);
  15
  16 #include <chrono>
  17 #include <cassert>
  18
  19 #include "test_macros.h"
  20
  21 int main(int, char**)
  22 {
  23     typedef std::chrono::system_clock Clock;
  24     typedef std::chrono::microseconds Duration1;
  25     typedef std::chrono::milliseconds Duration2;
  26     {
  27     std::chrono::time_point<Clock, Duration2> t2(Duration2(3));
  28     std::chrono::time_point<Clock, Duration1> t1 = t2;
  29     assert(t1.time_since_epoch() == Duration1(3000));
  30     }
  31 #if TEST_STD_VER > 11
  32     {
  33     constexpr std::chrono::time_point<Clock, Duration2> t2(Duration2(3));
  34     constexpr std::chrono::time_point<Clock, Duration1> t1 = t2;
  35     static_assert(t1.time_since_epoch() == Duration1(3000), "");
  36     }
  37 #endif
  38
  39   return 0;
  40 }