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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-exception6//7//===----------------------------------------------------------------------===//8// UNSUPPORTED: c++03, c++11, c++14, c++179 10// <chrono>11// class day;12 13//  constexpr day& operator++() noexcept;14//  constexpr day operator++(int) noexcept;15 16#include <chrono>17#include <cassert>18#include <type_traits>19#include <utility>20 21#include "test_macros.h"22 23using day = std::chrono::day;24 25constexpr bool test() {26  for (unsigned i = 10; i <= 20; ++i) {27    day d(i);28    assert(static_cast<unsigned>(++d) == i + 1);29    assert(static_cast<unsigned>(d++) == i + 1);30    assert(static_cast<unsigned>(d) == i + 2);31  }32 33  return true;34}35 36int main(int, char**) {37  ASSERT_NOEXCEPT(++(std::declval<day&>()));38  ASSERT_NOEXCEPT((std::declval<day&>())++);39 40  ASSERT_SAME_TYPE(day, decltype(std::declval<day&>()++));41  ASSERT_SAME_TYPE(day&, decltype(++std::declval<day&>()));42 43  test();44  static_assert(test());45 46  return 0;47}48