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 
9 // <system_error>
10 
11 // class error_code
12 
13 // template <ErrorCodeEnum E> error_code& operator=(E e);
14 
15 #include <system_error>
16 #include <cassert>
17 #include <type_traits>
18 
19 #include "test_macros.h"
20 
21 enum testing
22 {
23     zero, one, two
24 };
25 
26 namespace std
27 {
28 
29 template <> struct is_error_code_enum<testing> : public std::true_type {};
30 
31 }
32 
33 std::error_code
34 make_error_code(testing x)
35 {
36     return std::error_code(static_cast<int>(x), std::generic_category());
37 }
38 
39 int main(int, char**)
40 {
41     {
42         std::error_code ec;
43         ec = two;
44         assert(ec.value() == 2);
45         assert(ec.category() == std::generic_category());
46     }
47 
48   return 0;
49 }
50