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 weekday;
13 
14 //  constexpr bool ok() const noexcept;
15 //  Returns: wd_ <= 6
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 weekday = std::chrono::weekday;
26 
27     ASSERT_NOEXCEPT(                std::declval<const weekday>().ok());
28     ASSERT_SAME_TYPE(bool, decltype(std::declval<const weekday>().ok()));
29 
30     static_assert( weekday{0}.ok(), "");
31     static_assert( weekday{1}.ok(), "");
32     static_assert(!weekday{7}.ok(), "");
33 
34     for (unsigned i = 0; i <= 6; ++i)
35         assert(weekday{i}.ok());
36     for (unsigned i = 7; i <= 255; ++i)
37         assert(!weekday{i}.ok());
38 }
39