| //===----------------------------------------------------------------------===// |
| // |
| // 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 weekday; |
| |
| // constexpr weekday& operator+=(const days& d) noexcept; |
| // constexpr weekday& operator-=(const days& d) noexcept; |
| |
| #include <chrono> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "../../euclidian.h" |
| |
| template <typename M, typename Ms> |
| constexpr bool testConstexpr() |
| { |
| M m1{1}; |
| if (static_cast<unsigned>(m1 += Ms{ 1}) != 2) return false; |
| if (static_cast<unsigned>(m1 += Ms{ 2}) != 4) return false; |
| if (static_cast<unsigned>(m1 += Ms{ 4}) != 1) return false; |
| if (static_cast<unsigned>(m1 -= Ms{ 1}) != 0) return false; |
| if (static_cast<unsigned>(m1 -= Ms{ 2}) != 5) return false; |
| if (static_cast<unsigned>(m1 -= Ms{ 4}) != 1) return false; |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| using weekday = std::chrono::weekday; |
| using days = std::chrono::days; |
| |
| ASSERT_NOEXCEPT( std::declval<weekday&>() += std::declval<days&>()); |
| ASSERT_SAME_TYPE(weekday&, decltype(std::declval<weekday&>() += std::declval<days&>())); |
| |
| ASSERT_NOEXCEPT( std::declval<weekday&>() -= std::declval<days&>()); |
| ASSERT_SAME_TYPE(weekday&, decltype(std::declval<weekday&>() -= std::declval<days&>())); |
| |
| static_assert(testConstexpr<weekday, days>(), ""); |
| |
| for (unsigned i = 0; i <= 6; ++i) |
| { |
| weekday wd(i); |
| assert((static_cast<unsigned>(wd += days{3}) == euclidian_addition<unsigned, 0, 6>(i, 3))); |
| assert((static_cast<unsigned>(wd) == euclidian_addition<unsigned, 0, 6>(i, 3))); |
| } |
| |
| for (unsigned i = 0; i <= 6; ++i) |
| { |
| weekday wd(i); |
| assert((static_cast<unsigned>(wd -= days{4}) == euclidian_subtraction<unsigned, 0, 6>(i, 4))); |
| assert((static_cast<unsigned>(wd) == euclidian_subtraction<unsigned, 0, 6>(i, 4))); |
| } |
| |
| return 0; |
| } |