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_day;
13
14 // constexpr year_month_day operator+(const year_month_day& ymd, const months& dm) noexcept;
15 // Returns: (ymd.year() / ymd.month() + dm) / ymd.day().
16 //
17 // constexpr year_month_day operator+(const months& dm, const year_month_day& ymd) noexcept;
18 // Returns: ymd + dm.
19 //
20 //
21 // constexpr year_month_day operator+(const year_month_day& ymd, const years& dy) noexcept;
22 // Returns: (ymd.year() + dy) / ymd.month() / ymd.day().
23 //
24 // constexpr year_month_day operator+(const years& dy, const year_month_day& 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
testConstexprYears(std::chrono::year_month_day ym)35 constexpr bool testConstexprYears(std::chrono::year_month_day 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
testConstexprMonths(std::chrono::year_month_day ym)45 constexpr bool testConstexprMonths(std::chrono::year_month_day 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
main()55 int main()
56 {
57 using day = std::chrono::day;
58 using year = std::chrono::year;
59 using years = std::chrono::years;
60 using month = std::chrono::month;
61 using months = std::chrono::months;
62 using year_month_day = std::chrono::year_month_day;
63
64 { // year_month_day + months
65 ASSERT_NOEXCEPT(std::declval<year_month_day>() + std::declval<months>());
66 ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month_day>());
67
68 ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<year_month_day>() + std::declval<months>()));
69 ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<months>() + std::declval<year_month_day>()));
70
71 static_assert(testConstexprMonths(year_month_day{year{1}, month{1}, day{1}}), "");
72
73 year_month_day ym{year{1234}, std::chrono::January, day{12}};
74 for (int i = 0; i <= 10; ++i) // TODO test wrap-around
75 {
76 year_month_day ym1 = ym + months{i};
77 year_month_day ym2 = months{i} + ym;
78 assert(static_cast<int>(ym1.year()) == 1234);
79 assert(static_cast<int>(ym2.year()) == 1234);
80 assert(ym1.month() == month(1 + i));
81 assert(ym2.month() == month(1 + i));
82 assert(ym1.day() == day{12});
83 assert(ym2.day() == day{12});
84 assert(ym1 == ym2);
85 }
86 }
87
88 { // year_month_day + years
89 ASSERT_NOEXCEPT(std::declval<year_month_day>() + std::declval<years>());
90 ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month_day>());
91
92 ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<year_month_day>() + std::declval<years>()));
93 ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<years>() + std::declval<year_month_day>()));
94
95 static_assert(testConstexprYears (year_month_day{year{1}, month{1}, day{1}}), "");
96
97 year_month_day ym{year{1234}, std::chrono::January, day{12}};
98 for (int i = 0; i <= 10; ++i)
99 {
100 year_month_day ym1 = ym + years{i};
101 year_month_day ym2 = years{i} + ym;
102 assert(static_cast<int>(ym1.year()) == i + 1234);
103 assert(static_cast<int>(ym2.year()) == i + 1234);
104 assert(ym1.month() == std::chrono::January);
105 assert(ym2.month() == std::chrono::January);
106 assert(ym1.day() == day{12});
107 assert(ym2.day() == day{12});
108 assert(ym1 == ym2);
109 }
110 }
111
112 }
113