1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 // UNSUPPORTED: c++03, c++11, c++14, c++17
9
10 // <chrono>
11 // class month_day;
12
13 // constexpr bool ok() const noexcept;
14 // Returns: true if m_.ok() is true, 1d <= d_, and d_ is less than or equal to the
15 // number of days in month m_; otherwise returns false.
16 // When m_ == February, the number of days is considered to be 29.
17
18 #include <chrono>
19 #include <type_traits>
20 #include <cassert>
21
22 #include "test_macros.h"
23
main(int,char **)24 int main(int, char**)
25 {
26 using day = std::chrono::day;
27 using month = std::chrono::month;
28 using month_day = std::chrono::month_day;
29
30 ASSERT_NOEXCEPT( std::declval<const month_day>().ok());
31 ASSERT_SAME_TYPE(bool, decltype(std::declval<const month_day>().ok()));
32
33 static_assert(!month_day{}.ok(), "");
34 static_assert( month_day{std::chrono::May, day{2}}.ok(), "");
35
36 assert(!(month_day(std::chrono::April, day{0}).ok()));
37
38 assert( (month_day{std::chrono::March, day{1}}.ok()));
39 for (unsigned i = 1; i <= 12; ++i)
40 {
41 const bool is31 = i == 1 || i == 3 || i == 5 || i == 7 || i == 8 || i == 10 || i == 12;
42 assert(!(month_day{month{i}, day{ 0}}.ok()));
43 assert( (month_day{month{i}, day{ 1}}.ok()));
44 assert( (month_day{month{i}, day{10}}.ok()));
45 assert( (month_day{month{i}, day{29}}.ok()));
46 assert( (month_day{month{i}, day{30}}.ok()) == (i != 2));
47 assert( (month_day{month{i}, day{31}}.ok()) == is31);
48 assert(!(month_day{month{i}, day{32}}.ok()));
49 }
50
51 // If the month is not ok, all the days are bad
52 for (unsigned i = 1; i <= 35; ++i)
53 assert(!(month_day{month{13}, day{i}}.ok()));
54
55 return 0;
56 }
57