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;
13 
14 // constexpr bool ok() const noexcept;
15 //  Returns: 1 <= d_ && d_ <= 12
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 
27     ASSERT_NOEXCEPT(                std::declval<const month>().ok());
28     ASSERT_SAME_TYPE(bool, decltype(std::declval<const month>().ok()));
29 
30     static_assert(!month{0}.ok(), "");
31     static_assert( month{1}.ok(), "");
32 
33     assert(!month{0}.ok());
34     for (unsigned i = 1; i <= 12; ++i)
35         assert(month{i}.ok());
36     for (unsigned i = 13; i <= 255; ++i)
37         assert(!month{i}.ok());
38 }
39