| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17 |
| |
| // <chrono> |
| // class year; |
| |
| // constexpr year operator+(const year& x, const years& y) noexcept; |
| // Returns: year(int{x} + y.count()). |
| // |
| // constexpr year operator+(const years& x, const year& y) noexcept; |
| // Returns: y + x |
| |
| |
| #include <chrono> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| template <typename Y, typename Ys> |
| constexpr bool testConstexpr() |
| { |
| Y y{1001}; |
| Ys offset{23}; |
| if (y + offset != Y{1024}) return false; |
| if (offset + y != Y{1024}) return false; |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| using year = std::chrono::year; |
| using years = std::chrono::years; |
| |
| ASSERT_NOEXCEPT( std::declval<year>() + std::declval<years>()); |
| ASSERT_SAME_TYPE(year, decltype(std::declval<year>() + std::declval<years>())); |
| |
| ASSERT_NOEXCEPT( std::declval<years>() + std::declval<year>()); |
| ASSERT_SAME_TYPE(year, decltype(std::declval<years>() + std::declval<year>())); |
| |
| static_assert(testConstexpr<year, years>(), ""); |
| |
| year y{1223}; |
| for (int i = 1100; i <= 1110; ++i) |
| { |
| year y1 = y + years{i}; |
| year y2 = years{i} + y; |
| assert(y1 == y2); |
| assert(static_cast<int>(y1) == i + 1223); |
| assert(static_cast<int>(y2) == i + 1223); |
| } |
| |
| return 0; |
| } |