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// UNSUPPORTED: c++03, c++11, c++14
10// <chrono>
11
12// floor
13
14// template <class ToDuration, class Clock, class Duration>
15// time_point<Clock, ToDuration>
16// floor(const time_point<Clock, Duration>& t);
17
18#include <chrono>
19#include <type_traits>
20#include <cassert>
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::floor<ToDuration>(f)) R;
35 static_assert((std::is_same<R, ToTimePoint>::value), "");
36 assert(std::chrono::floor<ToDuration>(f) == t);
37 }
38}
39
40template<class FromDuration, long long From, class ToDuration, long long To>
41void test_constexpr ()
42{
43 typedef std::chrono::system_clock Clock;
44 typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
45 typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
46 {
47 constexpr FromTimePoint f{FromDuration{From}};
48 constexpr ToTimePoint t{ToDuration{To}};
49 static_assert(std::chrono::floor<ToDuration>(f) == t, "");
50 }
51}
52
53int main(int, char**)
54{
55// 7290000ms is 2 hours, 1 minute, and 30 seconds
56 test(df: std::chrono::milliseconds( 7290000), d: std::chrono::hours( 2));
57 test(df: std::chrono::milliseconds(-7290000), d: std::chrono::hours(-3));
58 test(df: std::chrono::milliseconds( 7290000), d: std::chrono::minutes( 121));
59 test(df: std::chrono::milliseconds(-7290000), d: std::chrono::minutes(-122));
60
61// 9000000ms is 2 hours and 30 minutes
62 test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::hours, 2> ();
63 test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::hours, -3> ();
64 test_constexpr<std::chrono::milliseconds, 9000001, std::chrono::minutes, 150> ();
65 test_constexpr<std::chrono::milliseconds,-9000001, std::chrono::minutes,-151> ();
66
67 test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::seconds, 9000> ();
68 test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::seconds,-9000> ();
69
70 return 0;
71}
72

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