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 year_month_day_last
14 // operator+(const year_month_day_last& ymdl, const months& dm) noexcept;
15 //
16 // Returns: (ymdl.year() / ymdl.month() + dm) / last.
17 //
18 // constexpr year_month_day_last
19 // operator+(const months& dm, const year_month_day_last& ymdl) noexcept;
20 //
21 // Returns: ymdl + dm.
22 //
23 //
24 // constexpr year_month_day_last
25 // operator+(const year_month_day_last& ymdl, const years& dy) noexcept;
26 //
27 // Returns: {ymdl.year()+dy, ymdl.month_day_last()}.
28 //
29 // constexpr year_month_day_last
30 // operator+(const years& dy, const year_month_day_last& ymdl) noexcept;
31 //
32 // Returns: ymdl + dy
33
34
35
36 #include <chrono>
37 #include <type_traits>
38 #include <cassert>
39
40 #include "test_macros.h"
41
testConstexprYears(std::chrono::year_month_day_last ymdl)42 constexpr bool testConstexprYears(std::chrono::year_month_day_last ymdl)
43 {
44 std::chrono::years offset{23};
45 if (static_cast<int>((ymdl ).year()) != 1) return false;
46 if (static_cast<int>((ymdl + offset).year()) != 24) return false;
47 if ( (ymdl + offset).month() != ymdl.month()) return false;
48 if (static_cast<int>((offset + ymdl).year()) != 24) return false;
49 if ( (offset + ymdl).month() != ymdl.month()) return false;
50 return true;
51 }
52
53
testConstexprMonths(std::chrono::year_month_day_last ymdl)54 constexpr bool testConstexprMonths(std::chrono::year_month_day_last ymdl)
55 {
56 std::chrono::months offset{6};
57 if (static_cast<unsigned>((ymdl ).month()) != 1) return false;
58 if ( (ymdl + offset).year() != ymdl.year()) return false;
59 if (static_cast<unsigned>((ymdl + offset).month()) != 7) return false;
60 if (static_cast<unsigned>((offset + ymdl).month()) != 7) return false;
61 if ( (offset + ymdl).year() != ymdl.year()) return false;
62 return true;
63 }
64
65
main(int,char **)66 int main(int, char**)
67 {
68 using year = std::chrono::year;
69 using month = std::chrono::month;
70 using month_day_last = std::chrono::month_day_last;
71 using year_month_day_last = std::chrono::year_month_day_last;
72 using months = std::chrono::months;
73 using years = std::chrono::years;
74
75 constexpr month January = std::chrono::January;
76
77 { // year_month_day_last + months
78 ASSERT_NOEXCEPT(std::declval<year_month_day_last>() + std::declval<months>());
79 ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month_day_last>());
80
81 ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<year_month_day_last>() + std::declval<months>()));
82 ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<months>() + std::declval<year_month_day_last>()));
83
84 static_assert(testConstexprMonths(year_month_day_last{year{1}, month_day_last{January}}), "");
85
86 year_month_day_last ym{year{1234}, month_day_last{January}};
87 for (int i = 0; i <= 10; ++i) // TODO test wrap-around
88 {
89 year_month_day_last ym1 = ym + months{i};
90 year_month_day_last ym2 = months{i} + ym;
91 assert(static_cast<int>(ym1.year()) == 1234);
92 assert(static_cast<int>(ym2.year()) == 1234);
93 assert(ym1.month() == month(1 + i));
94 assert(ym2.month() == month(1 + i));
95 assert(ym1 == ym2);
96 }
97 }
98
99 { // year_month_day_last + years
100 ASSERT_NOEXCEPT(std::declval<year_month_day_last>() + std::declval<years>());
101 ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month_day_last>());
102
103 ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<year_month_day_last>() + std::declval<years>()));
104 ASSERT_SAME_TYPE(year_month_day_last, decltype(std::declval<years>() + std::declval<year_month_day_last>()));
105
106 static_assert(testConstexprYears(year_month_day_last{year{1}, month_day_last{January}}), "");
107
108 year_month_day_last ym{year{1234}, month_day_last{January}};
109 for (int i = 0; i <= 10; ++i)
110 {
111 year_month_day_last ym1 = ym + years{i};
112 year_month_day_last ym2 = years{i} + ym;
113 assert(static_cast<int>(ym1.year()) == i + 1234);
114 assert(static_cast<int>(ym2.year()) == i + 1234);
115 assert(ym1.month() == std::chrono::January);
116 assert(ym2.month() == std::chrono::January);
117 assert(ym1 == ym2);
118 }
119 }
120
121
122 return 0;
123 }
124