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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // UNSUPPORTED: c++03, c++11, c++14, c++17 9 10 // <chrono> 11 // class weekday; 12 13 // constexpr unsigned c_encoding() const noexcept; 14 15 16 #include <chrono> 17 #include <type_traits> 18 #include <cassert> 19 20 #include "test_macros.h" 21 22 template <typename WD> testConstexpr()23constexpr bool testConstexpr() 24 { 25 WD wd{5}; 26 return wd.c_encoding() == 5; 27 } 28 main(int,char **)29int main(int, char**) 30 { 31 using weekday = std::chrono::weekday; 32 33 ASSERT_NOEXCEPT( std::declval<weekday&>().c_encoding()); 34 ASSERT_SAME_TYPE(unsigned, decltype(std::declval<weekday&>().c_encoding())); 35 36 static_assert(testConstexpr<weekday>(), ""); 37 38 for (unsigned i = 0; i <= 10; ++i) 39 { 40 weekday wd(i); 41 assert(wd.c_encoding() == (i == 7 ? 0 : i)); 42 } 43 44 return 0; 45 } 46