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 Rep, class Period>
15 // constexpr
16 // ToDuration
17 // floor(const duration<Rep, Period>& d);
18
19 #include <chrono>
20 #include <type_traits>
21 #include <cassert>
22
23 #include "test_macros.h"
24
25 template <class ToDuration, class FromDuration>
26 void
test(const FromDuration & f,const ToDuration & d)27 test(const FromDuration& f, const ToDuration& d)
28 {
29 {
30 typedef decltype(std::chrono::floor<ToDuration>(f)) R;
31 static_assert((std::is_same<R, ToDuration>::value), "");
32 assert(std::chrono::floor<ToDuration>(f) == d);
33 }
34 }
35
main(int,char **)36 int main(int, char**)
37 {
38 // 7290000ms is 2 hours, 1 minute, and 30 seconds
39 test(std::chrono::milliseconds( 7290000), std::chrono::hours( 2));
40 test(std::chrono::milliseconds(-7290000), std::chrono::hours(-3));
41 test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 121));
42 test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-122));
43
44 {
45 // 9000000ms is 2 hours and 30 minutes
46 constexpr std::chrono::hours h1 = std::chrono::floor<std::chrono::hours>(std::chrono::milliseconds(9000000));
47 static_assert(h1.count() == 2, "");
48 constexpr std::chrono::hours h2 = std::chrono::floor<std::chrono::hours>(std::chrono::milliseconds(-9000000));
49 static_assert(h2.count() == -3, "");
50 }
51
52 return 0;
53 }
54