a90c6dd460
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8
53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
}
|