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 month; 12 13 // constexpr bool ok() const noexcept; 14 // Returns: 1 <= d_ && d_ <= 12 15 16 #include <chrono> 17 #include <type_traits> 18 #include <cassert> 19 20 #include "test_macros.h" 21 main(int,char **)22int main(int, char**) 23 { 24 using month = std::chrono::month; 25 26 ASSERT_NOEXCEPT( std::declval<const month>().ok()); 27 ASSERT_SAME_TYPE(bool, decltype(std::declval<const month>().ok())); 28 29 static_assert(!month{0}.ok(), ""); 30 static_assert( month{1}.ok(), ""); 31 32 assert(!month{0}.ok()); 33 for (unsigned i = 1; i <= 12; ++i) 34 assert(month{i}.ok()); 35 for (unsigned i = 13; i <= 255; ++i) 36 assert(!month{i}.ok()); 37 38 return 0; 39 } 40