713f4db2e5
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@189722 91177308-0d34-0410-b5e6-96231b3b80d8
81 lines
3.0 KiB
C++
81 lines
3.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <chrono>
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// time_point
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// template <class ToDuration, class Clock, class Duration>
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// time_point<Clock, ToDuration>
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// time_point_cast(const time_point<Clock, Duration>& t);
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#include <chrono>
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#include <type_traits>
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#include <cassert>
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template <class FromDuration, class ToDuration>
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void
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test(const FromDuration& df, const ToDuration& d)
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{
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typedef std::chrono::system_clock Clock;
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typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
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typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
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{
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FromTimePoint f(df);
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ToTimePoint t(d);
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typedef decltype(std::chrono::time_point_cast<ToDuration>(f)) R;
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static_assert((std::is_same<R, ToTimePoint>::value), "");
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assert(std::chrono::time_point_cast<ToDuration>(f) == t);
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}
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}
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#if _LIBCPP_STD_VER > 11
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template<class FromDuration, long long From, class ToDuration, long long To>
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void test_constexpr ()
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{
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typedef std::chrono::system_clock Clock;
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typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
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typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
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{
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constexpr FromTimePoint f{FromDuration{From}};
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constexpr ToTimePoint t{ToDuration{To}};
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static_assert(std::chrono::time_point_cast<ToDuration>(f) == t, "");
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}
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}
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#endif
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int main()
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{
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test(std::chrono::milliseconds(7265000), std::chrono::hours(2));
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test(std::chrono::milliseconds(7265000), std::chrono::minutes(121));
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test(std::chrono::milliseconds(7265000), std::chrono::seconds(7265));
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test(std::chrono::milliseconds(7265000), std::chrono::milliseconds(7265000));
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test(std::chrono::milliseconds(7265000), std::chrono::microseconds(7265000000LL));
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test(std::chrono::milliseconds(7265000), std::chrono::nanoseconds(7265000000000LL));
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test(std::chrono::milliseconds(7265000),
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std::chrono::duration<double, std::ratio<3600> >(7265./3600));
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test(std::chrono::duration<int, std::ratio<2, 3> >(9),
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std::chrono::duration<int, std::ratio<3, 5> >(10));
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#if _LIBCPP_STD_VER > 11
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{
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test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::hours, 2> ();
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test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::minutes,121> ();
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test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::seconds,7265> ();
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test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::milliseconds,7265000> ();
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test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::microseconds,7265000000LL> ();
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test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::nanoseconds,7265000000000LL> ();
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typedef std::chrono::duration<int, std::ratio<3, 5>> T1;
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test_constexpr<std::chrono::duration<int, std::ratio<2, 3>>, 9, T1, 10> ();
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}
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#endif
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}
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