floor.pass.cpp revision 223df2ef0f543f7fef9270b3b34b9c73c869a006 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// UNSUPPORTED: c++03, c++11, c++14
11// <chrono>
12
13// floor
14
15// template <class ToDuration, class Rep, class Period>
16//   constexpr
17//   ToDuration
18//   floor(const duration<Rep, Period>& d);
19
20#include <chrono>
21#include <type_traits>
22#include <cassert>
23
24template <class ToDuration, class FromDuration>
25void
26test(const FromDuration& f, const ToDuration& d)
27{
28    {
29    typedef decltype(std::chrono::floor<ToDuration>(f)) R;
30    static_assert((std::is_same<R, ToDuration>::value), "");
31    assert(std::chrono::floor<ToDuration>(f) == d);
32    }
33}
34
35int main()
36{
37//  7290000ms is 2 hours, 1 minute, and 30 seconds
38    test(std::chrono::milliseconds( 7290000), std::chrono::hours( 2));
39    test(std::chrono::milliseconds(-7290000), std::chrono::hours(-3));
40    test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 121));
41    test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-122));
42
43    {
44//  9000000ms is 2 hours and 30 minutes
45    constexpr std::chrono::hours h1 = std::chrono::floor<std::chrono::hours>(std::chrono::milliseconds(9000000));
46    static_assert(h1.count() == 2, "");
47    constexpr std::chrono::hours h2 = std::chrono::floor<std::chrono::hours>(std::chrono::milliseconds(-9000000));
48    static_assert(h2.count() == -3, "");
49    }
50}
51