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 day;
12 
13 // constexpr bool ok() const noexcept;
14 //  Returns: 1 <= d_ && d_ <= 31
15 
16 #include <chrono>
17 #include <type_traits>
18 #include <cassert>
19 
20 #include "test_macros.h"
21 
main(int,char **)22 int main(int, char**)
23 {
24     using day = std::chrono::day;
25     ASSERT_NOEXCEPT(                std::declval<const day>().ok());
26     ASSERT_SAME_TYPE(bool, decltype(std::declval<const day>().ok()));
27 
28     static_assert(!day{0}.ok(), "");
29     static_assert( day{1}.ok(), "");
30 
31     assert(!day{0}.ok());
32     for (unsigned i = 1; i <= 31; ++i)
33         assert(day{i}.ok());
34     for (unsigned i = 32; i <= 255; ++i)
35         assert(!day{i}.ok());
36 
37   return 0;
38 }
39