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
10// UNSUPPORTED: c++98, c++03, c++11
11
12// <experimental/system_error>
13
14// template <class T> constexpr bool is_error_code_enum_v;
15
16#include <experimental/system_error>
17#include <ios> /* for std::io_errc */
18
19namespace ex = std::experimental;
20
21int main() {
22  {
23    static_assert(ex::is_error_code_enum_v<std::io_errc>, "");
24
25    static_assert(ex::is_error_code_enum_v<std::io_errc> ==
26                  std::is_error_code_enum <std::io_errc>::value, "");
27
28    static_assert(std::is_same<decltype(ex::is_error_code_enum_v<std::io_errc>),
29                               const bool>::value, "");
30  }
31  {
32    static_assert(!ex::is_error_code_enum_v<int>, "");
33
34    static_assert(ex::is_error_code_enum_v<int> ==
35                  std::is_error_code_enum <int>::value, "");
36  }
37}
38