| //===----------------------------------------------------------------------===// |
| // |
| // 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++03, c++11, c++14, c++17 |
| |
| // <chrono> |
| // class weekday; |
| |
| // constexpr unsigned iso_encoding() const noexcept; |
| // Returns the underlying weekday, _except_ that returns '7' for Sunday (zero) |
| // See [time.cal.wd.members] |
| |
| #include <chrono> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| template <typename WD> |
| constexpr bool testConstexpr() |
| { |
| WD wd{5}; |
| return wd.c_encoding() == 5; |
| } |
| |
| int main(int, char**) |
| { |
| using weekday = std::chrono::weekday; |
| |
| ASSERT_NOEXCEPT( std::declval<weekday&>().iso_encoding()); |
| ASSERT_SAME_TYPE(unsigned, decltype(std::declval<weekday&>().iso_encoding())); |
| |
| static_assert(testConstexpr<weekday>(), ""); |
| |
| // This is different than all the other tests, because the '7' gets converted to |
| // a zero in the constructor, but then back to '7' by iso_encoding(). |
| for (unsigned i = 0; i <= 10; ++i) |
| { |
| weekday wd(i); |
| assert(wd.iso_encoding() == (i == 0 ? 7 : i)); |
| } |
| |
| return 0; |
| } |