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Vendor import of libc++ trunk r351319 (just before the release_80
[FreeBSD/FreeBSD.git] / test / std / utilities / time / time.cal / time.cal.ymwd / time.cal.ymwd.nonmembers / plus.pass.cpp
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;
13
14 // constexpr year_month_weekday operator+(const year_month_weekday& ymd, const months& dm) noexcept;
15 //   Returns: (ymd.year() / ymd.month() + dm) / ymd.day().
16 //
17 // constexpr year_month_weekday operator+(const months& dm, const year_month_weekday& ymd) noexcept;
18 //   Returns: ymd + dm.
19 //
20 //
21 // constexpr year_month_weekday operator+(const year_month_weekday& ymd, const years& dy) noexcept;
22 //   Returns: (ymd.year() + dy) / ymd.month() / ymd.day().
23 //
24 // constexpr year_month_weekday operator+(const years& dy, const year_month_weekday& ymd) noexcept;
25 //   Returns: ym + dm.
26
27
28
29 #include <chrono>
30 #include <type_traits>
31 #include <cassert>
32
33 #include "test_macros.h"
34
35 constexpr bool testConstexprYears(std::chrono::year_month_weekday ym)
36 {
37     std::chrono::years offset{23};
38     if (static_cast<int>((ym         ).year()) !=  1) return false;
39     if (static_cast<int>((ym + offset).year()) != 24) return false;
40     if (static_cast<int>((offset + ym).year()) != 24) return false;
41     return true;
42 }
43
44
45 constexpr bool testConstexprMonths(std::chrono::year_month_weekday ym)
46 {
47     std::chrono::months offset{6};
48     if (static_cast<unsigned>((ym         ).month()) !=  1) return false;
49     if (static_cast<unsigned>((ym + offset).month()) !=  7) return false;
50     if (static_cast<unsigned>((offset + ym).month()) !=  7) return false;
51     return true;
52 }
53
54
55 int main()
56 {
57     using year               = std::chrono::year;
58     using month              = std::chrono::month;
59     using weekday            = std::chrono::weekday;
60     using weekday_indexed    = std::chrono::weekday_indexed;
61     using year_month_weekday = std::chrono::year_month_weekday;
62     using years              = std::chrono::years;
63     using months             = std::chrono::months;
64
65     constexpr weekday Tuesday = std::chrono::Tuesday;
66     constexpr month January = std::chrono::January;
67
68     {   // year_month_weekday + months (and switched)
69     ASSERT_NOEXCEPT(std::declval<year_month_weekday>() + std::declval<months>());
70     ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month_weekday>());
71
72     ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<year_month_weekday>() + std::declval<months>()));
73     ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<months>() + std::declval<year_month_weekday>()));
74
75     static_assert(testConstexprMonths(year_month_weekday{year{1}, January, weekday_indexed{Tuesday, 1}}), "");
76
77     year_month_weekday ym{year{1234}, January, weekday_indexed{Tuesday, 3}};
78     for (int i = 0; i <= 10; ++i)  // TODO test wrap-around
79     {
80         year_month_weekday ym1 = ym + months{i};
81         year_month_weekday ym2 = months{i} + ym;
82         assert(static_cast<int>(ym1.year()) == 1234);
83         assert(static_cast<int>(ym2.year()) == 1234);
84         assert(ym1.month()   == month(1 + i));
85         assert(ym2.month()   == month(1 + i));
86         assert(ym1.weekday() == Tuesday);
87         assert(ym2.weekday() == Tuesday);
88         assert(ym1.index()   == 3);
89         assert(ym2.index()   == 3);
90         assert(ym1 == ym2);
91     }
92     }
93
94     {   // year_month_weekday + years (and switched)
95     ASSERT_NOEXCEPT(std::declval<year_month_weekday>() + std::declval<years>());
96     ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month_weekday>());
97
98     ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<year_month_weekday>() + std::declval<years>()));
99     ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<years>() + std::declval<year_month_weekday>()));
100
101     static_assert(testConstexprYears (year_month_weekday{year{1}, January, weekday_indexed{Tuesday, 1}}), "");
102
103     year_month_weekday ym{year{1234}, std::chrono::January, weekday_indexed{Tuesday, 3}};
104     for (int i = 0; i <= 10; ++i)
105     {
106         year_month_weekday ym1 = ym + years{i};
107         year_month_weekday ym2 = years{i} + ym;
108         assert(static_cast<int>(ym1.year()) == i + 1234);
109         assert(static_cast<int>(ym2.year()) == i + 1234);
110         assert(ym1.month()   == January);
111         assert(ym2.month()   == January);
112         assert(ym1.weekday() == Tuesday);
113         assert(ym2.weekday() == Tuesday);
114         assert(ym1.index()   == 3);
115         assert(ym2.index()   == 3);
116         assert(ym1 == ym2);
117     }
118     }
119
120 }