libcxx/test/std/time/time.duration/time.duration.cons/convert_exact.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 // duration
  12
  13 // template <class Rep2, class Period2>
  14 //   duration(const duration<Rep2, Period2>& d);
  15
  16 // exact conversions allowed for integral reps
  17
  18 #include <chrono>
  19 #include <cassert>
  20
  21 #include "test_macros.h"
  22
  23 int main(int, char**)
  24 {
  25     {
  26     std::chrono::milliseconds ms(1);
  27     std::chrono::microseconds us = ms;
  28     assert(us.count() == 1000);
  29     }
  30 #if TEST_STD_VER >= 11
  31     {
  32     constexpr std::chrono::milliseconds ms(1);
  33     constexpr std::chrono::microseconds us = ms;
  34     static_assert(us.count() == 1000, "");
  35     }
  36 #endif
  37
  38   return 0;
  39 }