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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
//===----------------------------------------------------------------------===//
//
// 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_last;
// constexpr year_month_day_last
// operator+(const year_month_day_last& ymdl, const months& dm) noexcept;
//
// Returns: (ymdl.year() / ymdl.month() + dm) / last.
//
// constexpr year_month_day_last
// operator+(const months& dm, const year_month_day_last& ymdl) noexcept;
//
// Returns: ymdl + dm.
//
//
// constexpr year_month_day_last
// operator+(const year_month_day_last& ymdl, const years& dy) noexcept;
//
// Returns: {ymdl.year()+dy, ymdl.month_day_last()}.
//
// constexpr year_month_day_last
// operator+(const years& dy, const year_month_day_last& ymdl) noexcept;
//
// Returns: ymdl + dy
#include <chrono>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
constexpr bool testConstexprYears(std::chrono::year_month_day_last ymdl)
{
std::chrono::years offset{23};
if (static_cast<int>((ymdl ).year()) != 1) return false;
if (static_cast<int>((ymdl + offset).year()) != 24) return false;
if ( (ymdl + offset).month() != ymdl.month()) return false;
if (static_cast<int>((offset + ymdl).year()) != 24) return false;
if ( (offset + ymdl).month() != ymdl.month()) return false;
return true;
}
constexpr bool testConstexprMonths(std::chrono::year_month_day_last ymdl)
{
std::chrono::months offset{6};
if (static_cast<unsigned>((ymdl ).month()) != 1) return false;
if ( (ymdl + offset).year() != ymdl.year()) return false;
if (static_cast<unsigned>((ymdl + offset).month()) != 7) return false;
if (static_cast<unsigned>((offset + ymdl).month()) != 7) return false;
if ( (offset + ymdl).year() != ymdl.year()) return false;
return true;
}
int main(int, char**)
{
using year = std::chrono::year;
using month = std::chrono::month;
using month_day_last = std::chrono::month_day_last;
using year_month_day_last = std::chrono::year_month_day_last;
using months = std::chrono::months;
using years = std::chrono::years;
constexpr month January = std::chrono::January;
{ // year_month_day_last + months
ASSERT_NOEXCEPT(std::declval<year_month_day_last>() + std::declval<months>());
ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month_day_last>());
ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<year_month_day_last>() + std::declval<months>()));
ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<months>() + std::declval<year_month_day_last>()));
static_assert(testConstexprMonths(year_month_day_last{year{1}, month_day_last{January}}), "");
year_month_day_last ym{year{1234}, month_day_last{January}};
for (int i = 0; i <= 10; ++i) // TODO test wrap-around
{
year_month_day_last ym1 = ym + months{i};
year_month_day_last ym2 = months{i} + ym;
assert(static_cast<int>(ym1.year()) == 1234);
assert(static_cast<int>(ym2.year()) == 1234);
assert(ym1.month() == month(1 + i));
assert(ym2.month() == month(1 + i));
assert(ym1 == ym2);
}
}
{ // year_month_day_last + years
ASSERT_NOEXCEPT(std::declval<year_month_day_last>() + std::declval<years>());
ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month_day_last>());
ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<year_month_day_last>() + std::declval<years>()));
ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<years>() + std::declval<year_month_day_last>()));
static_assert(testConstexprYears(year_month_day_last{year{1}, month_day_last{January}}), "");
year_month_day_last ym{year{1234}, month_day_last{January}};
for (int i = 0; i <= 10; ++i)
{
year_month_day_last ym1 = ym + years{i};
year_month_day_last ym2 = years{i} + ym;
assert(static_cast<int>(ym1.year()) == i + 1234);
assert(static_cast<int>(ym2.year()) == i + 1234);
assert(ym1.month() == std::chrono::January);
assert(ym2.month() == std::chrono::January);
assert(ym1 == ym2);
}
}
return 0;
}
|
