1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
10
11 // <chrono>
12 // class year_month_weekday_last;
13
14 // constexpr year_month_weekday_last operator+(const year_month_weekday_last& ymwdl, const months& dm) noexcept;
15 // Returns: (ymwdl.year() / ymwdl.month() + dm) / ymwdl.weekday_last().
16 //
17 // constexpr year_month_weekday_last operator+(const months& dm, const year_month_weekday_last& ymwdl) noexcept;
18 // Returns: ymwdl + dm.
19 //
20 // constexpr year_month_weekday_last operator+(const year_month_weekday_last& ymwdl, const years& dy) noexcept;
21 // Returns: {ymwdl.year()+dy, ymwdl.month(), ymwdl.weekday_last()}.
22 //
23 // constexpr year_month_weekday_last operator+(const years& dy, const year_month_weekday_last& ymwdl) noexcept;
24 // Returns: ymwdl + dy.
25
26 #include <chrono>
27 #include <type_traits>
28 #include <cassert>
29
30 #include "test_macros.h"
31
testConstexprYears(std::chrono::year_month_weekday_last ym)32 constexpr bool testConstexprYears(std::chrono::year_month_weekday_last ym)
33 {
34 std::chrono::years offset{23};
35 if (static_cast<int>((ym ).year()) != 1) return false;
36 if (static_cast<int>((ym + offset).year()) != 24) return false;
37 if (static_cast<int>((offset + ym).year()) != 24) return false;
38 return true;
39 }
40
testConstexprMonths(std::chrono::year_month_weekday_last ym)41 constexpr bool testConstexprMonths(std::chrono::year_month_weekday_last ym)
42 {
43 std::chrono::months offset{6};
44 if (static_cast<unsigned>((ym ).month()) != 1) return false;
45 if (static_cast<unsigned>((ym + offset).month()) != 7) return false;
46 if (static_cast<unsigned>((offset + ym).month()) != 7) return false;
47 return true;
48 }
49
50
main()51 int main()
52 {
53 using year = std::chrono::year;
54 using month = std::chrono::month;
55 using weekday = std::chrono::weekday;
56 using weekday_last = std::chrono::weekday_last;
57 using year_month_weekday_last = std::chrono::year_month_weekday_last;
58 using years = std::chrono::years;
59 using months = std::chrono::months;
60
61 constexpr weekday Tuesday = std::chrono::Tuesday;
62 constexpr month January = std::chrono::January;
63
64 { // year_month_weekday_last + months
65 ASSERT_NOEXCEPT(std::declval<year_month_weekday_last>() + std::declval<months>());
66 ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month_weekday_last>());
67
68 ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<year_month_weekday_last>() + std::declval<months>()));
69 ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<months>() + std::declval<year_month_weekday_last>()));
70
71 static_assert(testConstexprMonths(year_month_weekday_last{year{1}, January, weekday_last{Tuesday}}), "");
72
73 year_month_weekday_last ym{year{1234}, January, weekday_last{Tuesday}};
74 for (int i = 0; i <= 10; ++i) // TODO test wrap-around
75 {
76 year_month_weekday_last ym1 = ym + months{i};
77 year_month_weekday_last ym2 = months{i} + ym;
78 assert(ym1.year() == year(1234));
79 assert(ym2.year() == year(1234));
80 assert(ym1.month() == month(1 + i));
81 assert(ym2.month() == month(1 + i));
82 assert(ym1.weekday() == Tuesday);
83 assert(ym2.weekday() == Tuesday);
84 assert(ym1.weekday_last() == weekday_last{Tuesday});
85 assert(ym2.weekday_last() == weekday_last{Tuesday});
86 assert(ym1 == ym2);
87 }
88 }
89
90 { // year_month_weekday_last + years
91 ASSERT_NOEXCEPT(std::declval<year_month_weekday_last>() + std::declval<years>());
92 ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month_weekday_last>());
93
94 ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<year_month_weekday_last>() + std::declval<years>()));
95 ASSERT_SAME_TYPE(year_month_weekday_last, decltype(std::declval<years>() + std::declval<year_month_weekday_last>()));
96
97 static_assert(testConstexprYears (year_month_weekday_last{year{1}, January, weekday_last{Tuesday}}), "");
98
99 year_month_weekday_last ym{year{1234}, std::chrono::January, weekday_last{Tuesday}};
100 for (int i = 0; i <= 10; ++i)
101 {
102 year_month_weekday_last ym1 = ym + years{i};
103 year_month_weekday_last ym2 = years{i} + ym;
104 assert(ym1.year() == year(1234 + i));
105 assert(ym2.year() == year(1234 + i));
106 assert(ym1.month() == January);
107 assert(ym2.month() == January);
108 assert(ym1.weekday() == Tuesday);
109 assert(ym2.weekday() == Tuesday);
110 assert(ym1.weekday_last() == weekday_last{Tuesday});
111 assert(ym2.weekday_last() == weekday_last{Tuesday});
112 assert(ym1 == ym2);
113 }
114 }
115
116 }
117