48 lines · 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-exception6//7//===----------------------------------------------------------------------===//8// UNSUPPORTED: c++03, c++11, c++14, c++179 10// <chrono>11// class year;12 13// constexpr year& operator--() noexcept;14// constexpr year 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 year = std::chrono::year;24 25constexpr bool test() {26 for (int i = 11000; i <= 11020; ++i) {27 year yr(i);28 assert(static_cast<int>(--yr) == i - 1);29 assert(static_cast<int>(yr--) == i - 1);30 assert(static_cast<int>(yr) == i - 2);31 }32 33 return true;34}35 36int main(int, char**) {37 ASSERT_NOEXCEPT(--(std::declval<year&>()));38 ASSERT_NOEXCEPT((std::declval<year&>())--);39 40 ASSERT_SAME_TYPE(year, decltype(std::declval<year&>()--));41 ASSERT_SAME_TYPE(year&, decltype(--std::declval<year&>()));42 43 test();44 static_assert(test());45 46 return 0;47}48