50 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+=(const years& d) noexcept;14// constexpr year& operator-=(const years& d) 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;24using years = std::chrono::years;25 26constexpr bool test() {27 for (int i = 10000; i <= 10020; ++i) {28 year yr(i);29 assert(static_cast<int>(yr += years{10}) == i + 10);30 assert(static_cast<int>(yr) == i + 10);31 assert(static_cast<int>(yr -= years{9}) == i + 1);32 assert(static_cast<int>(yr) == i + 1);33 }34 35 return true;36}37 38int main(int, char**) {39 ASSERT_NOEXCEPT(std::declval<year&>() += std::declval<years>());40 ASSERT_NOEXCEPT(std::declval<year&>() -= std::declval<years>());41 42 ASSERT_SAME_TYPE(year&, decltype(std::declval<year&>() += std::declval<years>()));43 ASSERT_SAME_TYPE(year&, decltype(std::declval<year&>() -= std::declval<years>()));44 45 test();46 static_assert(test());47 48 return 0;49}50