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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 bool ok() const noexcept;
15 //  Returns: y_.ok() && m_.ok() && wdl_.ok().
16 
17 #include <chrono>
18 #include <type_traits>
19 #include <cassert>
20 
21 #include "test_macros.h"
22 
main()23 int main()
24 {
25     using year                    = std::chrono::year;
26     using month                   = std::chrono::month;
27     using weekday                 = std::chrono::weekday;
28     using weekday_last            = std::chrono::weekday_last;
29     using year_month_weekday_last = std::chrono::year_month_weekday_last;
30 
31     constexpr month January   = std::chrono::January;
32     constexpr weekday Tuesday = std::chrono::Tuesday;
33 
34     ASSERT_NOEXCEPT(                std::declval<const year_month_weekday_last>().ok());
35     ASSERT_SAME_TYPE(bool, decltype(std::declval<const year_month_weekday_last>().ok()));
36 
37     static_assert(!year_month_weekday_last{year{-32768}, month{}, weekday_last{weekday{}}}.ok(),  ""); // All three bad
38 
39     static_assert(!year_month_weekday_last{year{-32768}, January, weekday_last{Tuesday}}.ok(),    ""); // Bad year
40     static_assert(!year_month_weekday_last{year{2019},   month{}, weekday_last{Tuesday}}.ok(),    ""); // Bad month
41     static_assert(!year_month_weekday_last{year{2019},   January, weekday_last{weekday{7}}}.ok(), ""); // Bad day
42 
43     static_assert(!year_month_weekday_last{year{-32768}, month{}, weekday_last{Tuesday}}.ok(),    ""); // Bad year & month
44     static_assert(!year_month_weekday_last{year{2019},   month{}, weekday_last{weekday{7}}}.ok(), ""); // Bad month & day
45     static_assert(!year_month_weekday_last{year{-32768}, January, weekday_last{weekday{7}}}.ok(), ""); // Bad year & day
46 
47     static_assert( year_month_weekday_last{year{2019},   January, weekday_last{Tuesday}}.ok(),    ""); // All OK
48 
49     for (unsigned i = 0; i <= 50; ++i)
50     {
51         year_month_weekday_last ym{year{2019}, January, weekday_last{Tuesday}};
52         assert((ym.ok() == weekday_last{Tuesday}.ok()));
53     }
54 
55     for (unsigned i = 0; i <= 50; ++i)
56     {
57         year_month_weekday_last ym{year{2019}, January, weekday_last{weekday{i}}};
58         assert((ym.ok() == weekday_last{weekday{i}}.ok()));
59     }
60 
61     for (unsigned i = 0; i <= 50; ++i)
62     {
63         year_month_weekday_last ym{year{2019}, month{i}, weekday_last{Tuesday}};
64         assert((ym.ok() == month{i}.ok()));
65     }
66 
67     const int ymax = static_cast<int>(year::max());
68     for (int i = ymax - 100; i <= ymax + 100; ++i)
69     {
70         year_month_weekday_last ym{year{i}, January, weekday_last{Tuesday}};
71         assert((ym.ok() == year{i}.ok()));
72     }
73 }
74