42 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8// UNSUPPORTED: c++03, c++11, c++14, c++179 10// <chrono>11// class weekday;12 13// constexpr unsigned c_encoding() const noexcept;14 15#include <chrono>16#include <cassert>17#include <type_traits>18#include <utility>19 20#include "test_macros.h"21 22using weekday = std::chrono::weekday;23 24constexpr bool test() {25 for (unsigned i = 0; i <= 10; ++i) {26 weekday wd(i);27 assert(wd.c_encoding() == (i == 7 ? 0 : i));28 }29 30 return true;31}32 33int main(int, char**) {34 ASSERT_NOEXCEPT(std::declval<weekday&>().c_encoding());35 ASSERT_SAME_TYPE(unsigned, decltype(std::declval<weekday&>().c_encoding()));36 37 test();38 static_assert(test());39 40 return 0;41}42