| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| } |