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 month_weekday_last;
13
14 // constexpr bool ok() const noexcept;
15 // Returns: 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 month = std::chrono::month;
26 using weekday = std::chrono::weekday;
27 using weekday_last = std::chrono::weekday_last;
28 using month_weekday_last = std::chrono::month_weekday_last;
29
30 constexpr month January = std::chrono::January;
31 constexpr weekday Tuesday = std::chrono::Tuesday;
32 constexpr weekday_last lastTuesday = weekday_last{Tuesday};
33
34 ASSERT_NOEXCEPT( std::declval<const month_weekday_last>().ok());
35 ASSERT_SAME_TYPE(bool, decltype(std::declval<const month_weekday_last>().ok()));
36
37 static_assert(!month_weekday_last{month{}, lastTuesday}.ok(), ""); // Bad month
38 static_assert(!month_weekday_last{January, weekday_last{weekday{12}}}.ok(), ""); // Bad month
39 static_assert( month_weekday_last{January, lastTuesday}.ok(), ""); // Both OK
40
41 for (unsigned i = 0; i <= 50; ++i)
42 {
43 month_weekday_last mwdl{month{i}, lastTuesday};
44 assert( mwdl.ok() == month{i}.ok());
45 }
46
47 for (unsigned i = 0; i <= 50; ++i)
48 {
49 month_weekday_last mwdl{January, weekday_last{weekday{i}}};
50 assert( mwdl.ok() == weekday_last{weekday{i}}.ok());
51 }
52 }
53