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 // <system_error>
11 
12 // class error_category
13 
14 // virtual string message(int ev) const = 0;
15 
16 #include <system_error>
17 #include <cassert>
18 #include <string>
19 
20 #include <stdio.h>
21 
main()22 int main()
23 {
24     const std::error_category& e_cat1 = std::generic_category();
25     const std::error_category& e_cat2 = std::system_category();
26     std::string m1 = e_cat1.message(5);
27     std::string m2 = e_cat2.message(5);
28     std::string m3 = e_cat2.message(6);
29     assert(!m1.empty());
30     assert(!m2.empty());
31     assert(!m3.empty());
32     assert(m1 == m2);
33     assert(m1 != m3);
34 }
35