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
22int 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