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// UNSUPPORTED: c++03, c++11, c++14, c++17
9// <chrono>
10
11// template <class Duration>
12// class hh_mm_ss
13//
14// constexpr precision subseconds() const noexcept;
15//
16// See the table in hours.pass.cpp for correspondence between the magic values used below
17
18#include <chrono>
19#include <cassert>
20#include <cstdint>
21#include <ratio>
22#include <utility>
23
24#include "test_macros.h"
25
26template <typename Duration>
27constexpr std::int64_t check_subseconds(Duration d)
28{
29 using HMS = std::chrono::hh_mm_ss<Duration>;
30 ASSERT_SAME_TYPE(typename HMS::precision, decltype(std::declval<HMS>().subseconds()));
31 ASSERT_NOEXCEPT( std::declval<HMS>().subseconds());
32 return HMS(d).subseconds().count();
33}
34
35int main(int, char**)
36{
37 using microfortnights = std::chrono::duration<int, std::ratio<756, 625>>;
38
39 static_assert( check_subseconds(d: std::chrono::seconds( 1)) == 0, "");
40 static_assert( check_subseconds(std::chrono::seconds(-1)) == 0, "");
41
42 assert( check_subseconds(std::chrono::seconds( 5000)) == 0);
43 assert( check_subseconds(std::chrono::seconds(-5000)) == 0);
44 assert( check_subseconds(std::chrono::minutes( 5000)) == 0);
45 assert( check_subseconds(std::chrono::minutes(-5000)) == 0);
46 assert( check_subseconds(std::chrono::hours( 11)) == 0);
47 assert( check_subseconds(std::chrono::hours(-11)) == 0);
48
49 assert( check_subseconds(std::chrono::milliseconds( 123456789LL)) == 789);
50 assert( check_subseconds(std::chrono::milliseconds(-123456789LL)) == 789);
51 assert( check_subseconds(std::chrono::microseconds( 123456789LL)) == 456789LL);
52 assert( check_subseconds(std::chrono::microseconds(-123456789LL)) == 456789LL);
53 assert( check_subseconds(std::chrono::nanoseconds( 123456789LL)) == 123456789LL);
54 assert( check_subseconds(std::chrono::nanoseconds(-123456789LL)) == 123456789LL);
55
56 assert( check_subseconds(microfortnights( 1000)) == 6000);
57 assert( check_subseconds(microfortnights( -1000)) == 6000);
58 assert( check_subseconds(microfortnights( 10000)) == 0);
59 assert( check_subseconds(microfortnights(-10000)) == 0);
60
61 return 0;
62}
63

source code of libcxx/test/std/time/time.hms/time.hms.members/subseconds.pass.cpp