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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <chrono>
// typedef duration<signed integral type of at least 23 bits, ratio<3600>> hours;
#include <chrono>
#include <type_traits>
#include <limits>
int main()
{
typedef std::chrono::hours D;
typedef D::rep Rep;
typedef D::period Period;
static_assert(std::is_signed<Rep>::value, "");
static_assert(std::is_integral<Rep>::value, "");
static_assert(std::numeric_limits<Rep>::digits >= 22, "");
static_assert((std::is_same<Period, std::ratio<3600> >::value), "");
}
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