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
10// <chrono>
11// class year_month_day_last;
12
13// constexpr operator sys_days() const noexcept;
14// Returns: sys_days{year()/month()/day()}.
15
16#include <chrono>
17#include <cassert>
18#include <type_traits>
19#include <utility>
20
21#include "test_macros.h"
22
23int main(int, char**)
24{
25 using year = std::chrono::year;
26 using month_day_last = std::chrono::month_day_last;
27 using year_month_day_last = std::chrono::year_month_day_last;
28 using sys_days = std::chrono::sys_days;
29 using days = std::chrono::days;
30
31 ASSERT_NOEXCEPT( static_cast<sys_days>(std::declval<const year_month_day_last>()));
32 ASSERT_SAME_TYPE(sys_days, decltype(static_cast<sys_days>(std::declval<const year_month_day_last>())));
33
34 { // Last day in Jan 1970 was the 31st
35 constexpr year_month_day_last ymdl{year{1970}, month_day_last{std::chrono::January}};
36 constexpr sys_days sd{ymdl};
37
38 static_assert(sd.time_since_epoch() == days{30}, "");
39 }
40
41 {
42 constexpr year_month_day_last ymdl{year{2000}, month_day_last{std::chrono::January}};
43 constexpr sys_days sd{ymdl};
44
45 static_assert(sd.time_since_epoch() == days{10957+30}, "");
46 }
47
48 {
49 constexpr year_month_day_last ymdl{year{1940}, month_day_last{std::chrono::January}};
50 constexpr sys_days sd{ymdl};
51
52 static_assert(sd.time_since_epoch() == days{-10957+29}, "");
53 }
54
55 {
56 year_month_day_last ymdl{year{1939}, month_day_last{std::chrono::November}};
57 sys_days sd{ymdl};
58
59 assert(sd.time_since_epoch() == days{-(10957+33)});
60 }
61
62 return 0;
63}
64

source code of libcxx/test/std/time/time.cal/time.cal.ymdlast/time.cal.ymdlast.members/op_sys_days.pass.cpp