libcxx/test/std/time/time.duration/time.duration.cast/ceil.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 // UNSUPPORTED: c++03, c++11, c++14
  10
  11 // <chrono>
  12
  13 // ceil
  14
  15 // template <class ToDuration, class Rep, class Period>
  16 //   constexpr
  17 //   ToDuration
  18 //   ceil(const duration<Rep, Period>& d);
  19
  20 #include <chrono>
  21 #include <type_traits>
  22 #include <cassert>
  23
  24 #include "test_macros.h"
  25
  26 template <class ToDuration, class FromDuration>
  27 void
  28 test(const FromDuration& f, const ToDuration& d)
  29 {
  30     {
  31     typedef decltype(std::chrono::ceil<ToDuration>(f)) R;
  32     static_assert((std::is_same<R, ToDuration>::value), "");
  33     assert(std::chrono::ceil<ToDuration>(f) == d);
  34     }
  35 }
  36
  37 int main(int, char**)
  38 {
  39 //  7290000ms is 2 hours, 1 minute, and 30 seconds
  40     test(std::chrono::milliseconds( 7290000), std::chrono::hours( 3));
  41     test(std::chrono::milliseconds(-7290000), std::chrono::hours(-2));
  42     test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 122));
  43     test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-121));
  44
  45     {
  46 //  9000000ms is 2 hours and 30 minutes
  47     constexpr std::chrono::hours h1 = std::chrono::ceil<std::chrono::hours>(std::chrono::milliseconds(9000000));
  48     static_assert(h1.count() == 3, "");
  49     constexpr std::chrono::hours h2 = std::chrono::ceil<std::chrono::hours>(std::chrono::milliseconds(-9000000));
  50     static_assert(h2.count() == -2, "");
  51     }
  52
  53   return 0;
  54 }