1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// <chrono>
10
11// time_point
12
13// template <class ToDuration, class Clock, class Duration>
14// time_point<Clock, ToDuration>
15// time_point_cast(const time_point<Clock, Duration>& t);
16
17#include <chrono>
18#include <cassert>
19#include <ratio>
20#include <type_traits>
21
22#include "test_macros.h"
23
24template <class FromDuration, class ToDuration>
25void
26test(const FromDuration& df, const ToDuration& d)
27{
28 typedef std::chrono::system_clock Clock;
29 typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
30 typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
31 {
32 FromTimePoint f(df);
33 ToTimePoint t(d);
34 typedef decltype(std::chrono::time_point_cast<ToDuration>(f)) R;
35 static_assert((std::is_same<R, ToTimePoint>::value), "");
36 assert(std::chrono::time_point_cast<ToDuration>(f) == t);
37 }
38}
39
40#if TEST_STD_VER > 11
41
42template<class FromDuration, long long From, class ToDuration, long long To>
43void test_constexpr ()
44{
45 typedef std::chrono::system_clock Clock;
46 typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
47 typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
48 {
49 constexpr FromTimePoint f{FromDuration{From}};
50 constexpr ToTimePoint t{ToDuration{To}};
51 static_assert(std::chrono::time_point_cast<ToDuration>(f) == t, "");
52 }
53
54}
55
56#endif
57
58int main(int, char**)
59{
60 test(df: std::chrono::milliseconds(7265000), d: std::chrono::hours(2));
61 test(df: std::chrono::milliseconds(7265000), d: std::chrono::minutes(121));
62 test(df: std::chrono::milliseconds(7265000), d: std::chrono::seconds(7265));
63 test(df: std::chrono::milliseconds(7265000), d: std::chrono::milliseconds(7265000));
64 test(df: std::chrono::milliseconds(7265000), d: std::chrono::microseconds(7265000000LL));
65 test(df: std::chrono::milliseconds(7265000), d: std::chrono::nanoseconds(7265000000000LL));
66 test(df: std::chrono::milliseconds(7265000),
67 d: std::chrono::duration<double, std::ratio<3600> >(7265./3600));
68 test(df: std::chrono::duration<int, std::ratio<2, 3> >(9),
69 d: std::chrono::duration<int, std::ratio<3, 5> >(10));
70#if TEST_STD_VER > 11
71 {
72 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::hours, 2> ();
73 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::minutes,121> ();
74 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::seconds,7265> ();
75 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::milliseconds,7265000> ();
76 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::microseconds,7265000000LL> ();
77 test_constexpr<std::chrono::milliseconds, 7265000, std::chrono::nanoseconds,7265000000000LL> ();
78 typedef std::chrono::duration<int, std::ratio<3, 5>> T1;
79 test_constexpr<std::chrono::duration<int, std::ratio<2, 3>>, 9, T1, 10> ();
80 }
81#endif
82
83 return 0;
84}
85

source code of libcxx/test/std/time/time.point/time.point.cast/time_point_cast.pass.cpp