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 13 // using months = duration<signed integer type of at least 20 bits, ratio_divide<years::period, ratio<12>>>; 14 15 16 #include <chrono> 17 #include <type_traits> 18 #include <limits> 19 20 int main() 21 { 22 typedef std::chrono::months D; 23 typedef D::rep Rep; 24 typedef D::period Period; 25 static_assert(std::is_signed<Rep>::value, ""); 26 static_assert(std::is_integral<Rep>::value, ""); 27 static_assert(std::numeric_limits<Rep>::digits >= 20, ""); 28 static_assert(std::is_same_v<Period, std::ratio_divide<std::chrono::years::period, std::ratio<12>>>, ""); 29 } 30
