1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <chrono>
// class year_month_day;
// explicit constexpr year_month_day(const local_days& dp) noexcept;
//
//
// Effects: Constructs an object of type year_month_day that corresponds
// to the date represented by dp
//
// Remarks: Equivalent to constructing with sys_days{dp.time_since_epoch()}.
//
// constexpr chrono::year year() const noexcept;
// constexpr chrono::month month() const noexcept;
// constexpr chrono::day day() const noexcept;
// constexpr bool ok() const noexcept;
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
int main(int, char**)
{
using year = std::chrono::year;
using day = std::chrono::day;
using local_days = std::chrono::local_days;
using days = std::chrono::days;
using year_month_day = std::chrono::year_month_day;
ASSERT_NOEXCEPT(year_month_day{std::declval<local_days>()});
{
constexpr local_days sd{};
constexpr year_month_day ymd{sd};
static_assert( ymd.ok(), "");
static_assert( ymd.year() == year{1970}, "");
static_assert( ymd.month() == std::chrono::January, "");
static_assert( ymd.day() == day{1}, "");
}
{
constexpr local_days sd{days{10957+32}};
constexpr year_month_day ymd{sd};
static_assert( ymd.ok(), "");
static_assert( ymd.year() == year{2000}, "");
static_assert( ymd.month() == std::chrono::February, "");
static_assert( ymd.day() == day{2}, "");
}
// There's one more leap day between 1/1/40 and 1/1/70
// when compared to 1/1/70 -> 1/1/2000
{
constexpr local_days sd{days{-10957}};
constexpr year_month_day ymd{sd};
static_assert( ymd.ok(), "");
static_assert( ymd.year() == year{1940}, "");
static_assert( ymd.month() == std::chrono::January, "");
static_assert( ymd.day() == day{2}, "");
}
{
local_days sd{days{-(10957+34)}};
year_month_day ymd{sd};
assert( ymd.ok());
assert( ymd.year() == year{1939});
assert( ymd.month() == std::chrono::November);
assert( ymd.day() == day{29});
}
return 0;
}
|
