ctor.pass.cpp (1259B)
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 day; 13 14 // day() = default; 15 // explicit constexpr day(unsigned d) noexcept; 16 // explicit constexpr operator unsigned() const noexcept; 17 18 // Effects: Constructs an object of type day by initializing d_ with d. 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 day = std::chrono::day; 30 31 ASSERT_NOEXCEPT(day{}); 32 ASSERT_NOEXCEPT(day(0U)); 33 ASSERT_NOEXCEPT(static_cast<unsigned>(day(0U))); 34 35 constexpr day d0{}; 36 static_assert(static_cast<unsigned>(d0) == 0, ""); 37 38 constexpr day d1{1}; 39 static_assert(static_cast<unsigned>(d1) == 1, ""); 40 41 for (unsigned i = 0; i <= 255; ++i) 42 { 43 day day(i); 44 assert(static_cast<unsigned>(day) == i); 45 } 46 }