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_weekday_last;
12
13 // constexpr year_month_weekday_last operator+(const year_month_weekday_last& ymwdl, const months& dm) noexcept;
14 // Returns: (ymwdl.year() / ymwdl.month() + dm) / ymwdl.weekday_last().
15 //
16 // constexpr year_month_weekday_last operator+(const months& dm, const year_month_weekday_last& ymwdl) noexcept;
17 // Returns: ymwdl + dm.
18 //
19 // constexpr year_month_weekday_last operator+(const year_month_weekday_last& ymwdl, const years& dy) noexcept;
20 // Returns: {ymwdl.year()+dy, ymwdl.month(), ymwdl.weekday_last()}.
21 //
22 // constexpr year_month_weekday_last operator+(const years& dy, const year_month_weekday_last& ymwdl) noexcept;
23 // Returns: ymwdl + dy.
24
25 #include <chrono>
26 #include <type_traits>
27 #include <cassert>
28
29 #include "test_macros.h"
30
testConstexprYears(std::chrono::year_month_weekday_last ym)31 constexpr bool testConstexprYears(std::chrono::year_month_weekday_last ym)
32 {
33 std::chrono::years offset{23};
34 if (static_cast<int>((ym ).year()) != 1) return false;
35 if (static_cast<int>((ym + offset).year()) != 24) return false;
36 if (static_cast<int>((offset + ym).year()) != 24) return false;
37 return true;
38 }
39
testConstexprMonths(std::chrono::year_month_weekday_last ym)40 constexpr bool testConstexprMonths(std::chrono::year_month_weekday_last ym)
41 {
42 std::chrono::months offset{6};
43 if (static_cast<unsigned>((ym ).month()) != 1) return false;
44 if (static_cast<unsigned>((ym + offset).month()) != 7) return false;
45 if (static_cast<unsigned>((offset + ym).month()) != 7) return false;
46 return true;
47 }
48
49
main(int,char **)50 int main(int, char**)
51 {
52 using year = std::chrono::year;
53 using month = std::chrono::month;
54 using weekday = std::chrono::weekday;
55 using weekday_last = std::chrono::weekday_last;
56 using year_month_weekday_last = std::chrono::year_month_weekday_last;
57 using years = std::chrono::years;
58 using months = std::chrono::months;
59
60 constexpr weekday Tuesday = std::chrono::Tuesday;
61 constexpr month January = std::chrono::January;
62
63 { // year_month_weekday_last + months
64 ASSERT_NOEXCEPT(std::declval<year_month_weekday_last>() + std::declval<months>());
65 ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month_weekday_last>());
66
67 ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<year_month_weekday_last>() + std::declval<months>()));
68 ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<months>() + std::declval<year_month_weekday_last>()));
69
70 static_assert(testConstexprMonths(year_month_weekday_last{year{1}, January, weekday_last{Tuesday}}), "");
71
72 year_month_weekday_last ym{year{1234}, January, weekday_last{Tuesday}};
73 for (int i = 0; i <= 10; ++i) // TODO test wrap-around
74 {
75 year_month_weekday_last ym1 = ym + months{i};
76 year_month_weekday_last ym2 = months{i} + ym;
77 assert(ym1.year() == year(1234));
78 assert(ym2.year() == year(1234));
79 assert(ym1.month() == month(1 + i));
80 assert(ym2.month() == month(1 + i));
81 assert(ym1.weekday() == Tuesday);
82 assert(ym2.weekday() == Tuesday);
83 assert(ym1.weekday_last() == weekday_last{Tuesday});
84 assert(ym2.weekday_last() == weekday_last{Tuesday});
85 assert(ym1 == ym2);
86 }
87 }
88
89 { // year_month_weekday_last + years
90 ASSERT_NOEXCEPT(std::declval<year_month_weekday_last>() + std::declval<years>());
91 ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month_weekday_last>());
92
93 ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<year_month_weekday_last>() + std::declval<years>()));
94 ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<years>() + std::declval<year_month_weekday_last>()));
95
96 static_assert(testConstexprYears (year_month_weekday_last{year{1}, January, weekday_last{Tuesday}}), "");
97
98 year_month_weekday_last ym{year{1234}, std::chrono::January, weekday_last{Tuesday}};
99 for (int i = 0; i <= 10; ++i)
100 {
101 year_month_weekday_last ym1 = ym + years{i};
102 year_month_weekday_last ym2 = years{i} + ym;
103 assert(ym1.year() == year(1234 + i));
104 assert(ym2.year() == year(1234 + i));
105 assert(ym1.month() == January);
106 assert(ym2.month() == January);
107 assert(ym1.weekday() == Tuesday);
108 assert(ym2.weekday() == Tuesday);
109 assert(ym1.weekday_last() == weekday_last{Tuesday});
110 assert(ym2.weekday_last() == weekday_last{Tuesday});
111 assert(ym1 == ym2);
112 }
113 }
114
115
116 return 0;
117 }
118