| //===----------------------------------------------------------------------===// |
| // |
| // 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_month_day; |
| |
| // constexpr year_month_day operator-(const year_month_day& ymd, const years& dy) noexcept; |
| // Returns: ymd + (-dy) |
| |
| |
| #include <chrono> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| constexpr bool test_constexpr () |
| { |
| std::chrono::year_month_day ym0{std::chrono::year{1234}, std::chrono::January, std::chrono::day{12}}; |
| std::chrono::year_month_day ym1 = ym0 - std::chrono::years{10}; |
| return |
| ym1.year() == std::chrono::year{1234-10} |
| && ym1.month() == std::chrono::January |
| && ym1.day() == std::chrono::day{12} |
| ; |
| } |
| |
| int main(int, char**) |
| { |
| using year = std::chrono::year; |
| using month = std::chrono::month; |
| using day = std::chrono::day; |
| using year_month_day = std::chrono::year_month_day; |
| using years = std::chrono::years; |
| |
| ASSERT_NOEXCEPT( std::declval<year_month_day>() - std::declval<years>()); |
| ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<year_month_day>() - std::declval<years>())); |
| |
| constexpr month January = std::chrono::January; |
| |
| static_assert(test_constexpr(), ""); |
| |
| year_month_day ym{year{1234}, January, day{10}}; |
| for (int i = 0; i <= 10; ++i) |
| { |
| year_month_day ym1 = ym - years{i}; |
| assert(static_cast<int>(ym1.year()) == 1234 - i); |
| assert(ym1.month() == January); |
| assert(ym1.day() == day{10}); |
| } |
| |
| return 0; |
| } |