libcxx/test/std/time/time.hms/time.12/is_pm.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 // UNSUPPORTED: c++03, c++11, c++14, c++17
   9 // <chrono>
  10
  11 // constexpr bool is_pm(const hours& h) noexcept;
  12 //   Returns: 12h <= h && h <= 23
  13
  14 #include <chrono>
  15 #include <cassert>
  16 #include <utility>
  17
  18 #include "test_macros.h"
  19
  20 int main(int, char**)
  21 {
  22     using hours = std::chrono::hours;
  23     ASSERT_SAME_TYPE(bool, decltype(std::chrono::is_pm(std::declval<hours>())));
  24     ASSERT_NOEXCEPT(                std::chrono::is_pm(std::declval<hours>()));
  25
  26     static_assert(!std::chrono::is_pm(hours( 0)), "");
  27     static_assert(!std::chrono::is_pm(hours(11)), "");
  28     static_assert( std::chrono::is_pm(hours(12)), "");
  29     static_assert( std::chrono::is_pm(hours(23)), "");
  30
  31     for (int i = 0; i < 12; ++i)
  32         assert(!std::chrono::is_pm(hours(i)));
  33     for (int i = 12; i < 24; ++i)
  34         assert( std::chrono::is_pm(hours(i)));
  35
  36     return 0;
  37 }