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;
12
13// explicit constexpr year_month_day(const local_days& dp) noexcept;
14//
15//
16// Effects: Constructs an object of type year_month_day that corresponds
17// to the date represented by dp
18//
19// Remarks: Equivalent to constructing with sys_days{dp.time_since_epoch()}.
20//
21// constexpr chrono::year year() const noexcept;
22// constexpr chrono::month month() const noexcept;
23// constexpr chrono::day day() const noexcept;
24// constexpr bool ok() const noexcept;
25
26#include <chrono>
27#include <cassert>
28#include <type_traits>
29#include <utility>
30
31#include "test_macros.h"
32
33int main(int, char**)
34{
35 using year = std::chrono::year;
36 using day = std::chrono::day;
37 using local_days = std::chrono::local_days;
38 using days = std::chrono::days;
39 using year_month_day = std::chrono::year_month_day;
40
41 ASSERT_NOEXCEPT(year_month_day{std::declval<local_days>()});
42
43 {
44 constexpr local_days sd{};
45 constexpr year_month_day ymd{sd};
46
47 static_assert( ymd.ok(), "");
48 static_assert( ymd.year() == year{1970}, "");
49 static_assert( ymd.month() == std::chrono::January, "");
50 static_assert( ymd.day() == day{1}, "");
51 }
52
53 {
54 constexpr local_days sd{days{10957+32}};
55 constexpr year_month_day ymd{sd};
56
57 static_assert( ymd.ok(), "");
58 static_assert( ymd.year() == year{2000}, "");
59 static_assert( ymd.month() == std::chrono::February, "");
60 static_assert( ymd.day() == day{2}, "");
61 }
62
63
64// There's one more leap day between 1/1/40 and 1/1/70
65// when compared to 1/1/70 -> 1/1/2000
66 {
67 constexpr local_days sd{days{-10957}};
68 constexpr year_month_day ymd{sd};
69
70 static_assert( ymd.ok(), "");
71 static_assert( ymd.year() == year{1940}, "");
72 static_assert( ymd.month() == std::chrono::January, "");
73 static_assert( ymd.day() == day{2}, "");
74 }
75
76 {
77 local_days sd{days{-(10957+34)}};
78 year_month_day ymd{sd};
79
80 assert( ymd.ok());
81 assert( ymd.year() == year{1939});
82 assert( ymd.month() == std::chrono::November);
83 assert( ymd.day() == day{29});
84 }
85
86 return 0;
87}
88

source code of libcxx/test/std/time/time.cal/time.cal.ymd/time.cal.ymd.members/ctor.local_days.pass.cpp