1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17 10 11 // <chrono> 12 // class month; 13 14 // month() = default; 15 // explicit constexpr month(int m) noexcept; 16 // explicit constexpr operator int() const noexcept; 17 18 // Effects: Constructs an object of type month by initializing m_ with m. 19 // The value held is unspecified if d is not in the range [0, 255]. 20 21 #include <chrono> 22 #include <type_traits> 23 #include <cassert> 24 25 #include "test_macros.h" 26 27 int main() 28 { 29 using month = std::chrono::month; 30 31 ASSERT_NOEXCEPT(month{}); 32 ASSERT_NOEXCEPT(month(1)); 33 ASSERT_NOEXCEPT(static_cast<unsigned>(month(1))); 34 35 constexpr month m0{}; 36 static_assert(static_cast<unsigned>(m0) == 0, ""); 37 38 constexpr month m1{1}; 39 static_assert(static_cast<unsigned>(m1) == 1, ""); 40 41 for (unsigned i = 0; i <= 255; ++i) 42 { 43 month m(i); 44 assert(static_cast<unsigned>(m) == i); 45 } 46 } 47
