| //===----------------------------------------------------------------------===// |
| // |
| // 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_weekday; |
| |
| // constexpr year_month_weekday operator-(const year_month_weekday& ymwd, const months& dm) noexcept; |
| // Returns: ymwd + (-dm). |
| // |
| // constexpr year_month_weekday operator-(const year_month_weekday& ymwd, const years& dy) noexcept; |
| // Returns: ymwd + (-dy). |
| |
| |
| #include <chrono> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| |
| constexpr bool testConstexprYears () |
| { |
| std::chrono::year_month_weekday ym0{std::chrono::year{1234}, std::chrono::January, std::chrono::weekday_indexed{std::chrono::Tuesday, 1}}; |
| std::chrono::year_month_weekday ym1 = ym0 - std::chrono::years{10}; |
| return |
| ym1.year() == std::chrono::year{1234-10} |
| && ym1.month() == std::chrono::January |
| && ym1.weekday() == std::chrono::Tuesday |
| && ym1.index() == 1 |
| ; |
| } |
| |
| constexpr bool testConstexprMonths () |
| { |
| std::chrono::year_month_weekday ym0{std::chrono::year{1234}, std::chrono::November, std::chrono::weekday_indexed{std::chrono::Tuesday, 1}}; |
| std::chrono::year_month_weekday ym1 = ym0 - std::chrono::months{6}; |
| return |
| ym1.year() == std::chrono::year{1234} |
| && ym1.month() == std::chrono::May |
| && ym1.weekday() == std::chrono::Tuesday |
| && ym1.index() == 1 |
| ; |
| } |
| |
| |
| int main(int, char**) |
| { |
| using year = std::chrono::year; |
| using month = std::chrono::month; |
| using weekday = std::chrono::weekday; |
| using weekday_indexed = std::chrono::weekday_indexed; |
| using year_month_weekday = std::chrono::year_month_weekday; |
| using years = std::chrono::years; |
| using months = std::chrono::months; |
| |
| constexpr month November = std::chrono::November; |
| constexpr weekday Tuesday = std::chrono::Tuesday; |
| |
| { // year_month_weekday - years |
| ASSERT_NOEXCEPT( std::declval<year_month_weekday>() - std::declval<years>()); |
| ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<year_month_weekday>() - std::declval<years>())); |
| |
| static_assert(testConstexprYears(), ""); |
| |
| year_month_weekday ym{year{1234}, November, weekday_indexed{Tuesday, 1}}; |
| for (int i = 0; i <= 10; ++i) |
| { |
| year_month_weekday ym1 = ym - years{i}; |
| assert(static_cast<int>(ym1.year()) == 1234 - i); |
| assert(ym1.month() == November); |
| assert(ym1.weekday() == Tuesday); |
| assert(ym1.index() == 1); |
| } |
| } |
| |
| { // year_month_weekday - months |
| ASSERT_NOEXCEPT( std::declval<year_month_weekday>() - std::declval<months>()); |
| ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<year_month_weekday>() - std::declval<months>())); |
| |
| static_assert(testConstexprMonths(), ""); |
| |
| year_month_weekday ym{year{1234}, November, weekday_indexed{Tuesday, 2}}; |
| for (unsigned i = 1; i <= 10; ++i) |
| { |
| year_month_weekday ym1 = ym - months{i}; |
| assert(ym1.year() == year{1234}); |
| assert(ym1.month() == month{11-i}); |
| assert(ym1.weekday() == Tuesday); |
| assert(ym1.index() == 2); |
| } |
| } |
| |
| return 0; |
| } |