time_point_cast.pass.cpp revision c52f43e72dfcea03037729649da84c23b3beb04a 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <chrono>
11
12// time_point
13
14// template <class ToDuration, class Clock, class Duration>
15//   time_point<Clock, ToDuration>
16//   time_point_cast(const time_point<Clock, Duration>& t);
17
18#include <chrono>
19#include <type_traits>
20#include <cassert>
21
22template <class FromDuration, class ToDuration>
23void
24test(const FromDuration& df, const ToDuration& d)
25{
26    typedef std::chrono::system_clock Clock;
27    typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
28    typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
29    FromTimePoint f(df);
30    ToTimePoint t(d);
31    typedef decltype(std::chrono::time_point_cast<ToDuration>(f)) R;
32    static_assert((std::is_same<R, ToTimePoint>::value), "");
33    assert(std::chrono::time_point_cast<ToDuration>(f) == t);
34}
35
36int main()
37{
38    test(std::chrono::milliseconds(7265000), std::chrono::hours(2));
39    test(std::chrono::milliseconds(7265000), std::chrono::minutes(121));
40    test(std::chrono::milliseconds(7265000), std::chrono::seconds(7265));
41    test(std::chrono::milliseconds(7265000), std::chrono::milliseconds(7265000));
42    test(std::chrono::milliseconds(7265000), std::chrono::microseconds(7265000000LL));
43    test(std::chrono::milliseconds(7265000), std::chrono::nanoseconds(7265000000000LL));
44    test(std::chrono::milliseconds(7265000),
45         std::chrono::duration<double, std::ratio<3600> >(7265./3600));
46    test(std::chrono::duration<int, std::ratio<2, 3> >(9),
47         std::chrono::duration<int, std::ratio<3, 5> >(10));
48}
49