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
24 template <class FromDuration, class ToDuration>
25 void
test(const FromDuration & df,const ToDuration & d)26 test(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
42 template<class FromDuration, long long From, class ToDuration, long long To>
test_constexpr()43 void 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
main(int,char **)58 int main(int, char**)
59 {
60 test(std::chrono::milliseconds(7265000), std::chrono::hours(2));
61 test(std::chrono::milliseconds(7265000), std::chrono::minutes(121));
62 test(std::chrono::milliseconds(7265000), std::chrono::seconds(7265));
63 test(std::chrono::milliseconds(7265000), std::chrono::milliseconds(7265000));
64 test(std::chrono::milliseconds(7265000), std::chrono::microseconds(7265000000LL));
65 test(std::chrono::milliseconds(7265000), std::chrono::nanoseconds(7265000000000LL));
66 test(std::chrono::milliseconds(7265000),
67 std::chrono::duration<double, std::ratio<3600> >(7265./3600));
68 test(std::chrono::duration<int, std::ratio<2, 3> >(9),
69 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