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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>
// duration
// template <class ToDuration, class Rep, class Period>
// constexpr
// ToDuration
// duration_cast(const duration<Rep, Period>& d);
#include <chrono>
#include <type_traits>
#include <cassert>
template <class ToDuration, class FromDuration>
void
test(const FromDuration& f, const ToDuration& d)
{
{
typedef decltype(std::chrono::duration_cast<ToDuration>(f)) R;
static_assert((std::is_same<R, ToDuration>::value), "");
assert(std::chrono::duration_cast<ToDuration>(f) == d);
}
}
int main()
{
test(std::chrono::milliseconds(7265000), std::chrono::hours(2));
test(std::chrono::milliseconds(7265000), std::chrono::minutes(121));
test(std::chrono::milliseconds(7265000), std::chrono::seconds(7265));
test(std::chrono::milliseconds(7265000), std::chrono::milliseconds(7265000));
test(std::chrono::milliseconds(7265000), std::chrono::microseconds(7265000000LL));
test(std::chrono::milliseconds(7265000), std::chrono::nanoseconds(7265000000000LL));
test(std::chrono::milliseconds(7265000),
std::chrono::duration<double, std::ratio<3600> >(7265./3600));
test(std::chrono::duration<int, std::ratio<2, 3> >(9),
std::chrono::duration<int, std::ratio<3, 5> >(10));
#ifndef _LIBCPP_HAS_NO_CONSTEXPR
{
constexpr std::chrono::hours h = std::chrono::duration_cast<std::chrono::hours>(std::chrono::milliseconds(7265000));
static_assert(h.count() == 2, "");
}
#endif
}
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