1
2// Copyright 2018 Peter Dimov.
3// Distributed under the Boost Software License, Version 1.0.
4
5#include <boost/system/error_code.hpp>
6#include <boost/core/lightweight_test.hpp>
7
8using namespace boost::system;
9
10namespace lib1
11{
12
13error_code get_system_code();
14error_code get_generic_code();
15
16} // namespace lib1
17
18namespace lib2
19{
20
21error_code get_system_code();
22error_code get_generic_code();
23
24} // namespace lib2
25
26int main()
27{
28 {
29 error_code e1 = lib1::get_system_code();
30 error_code e2 = lib2::get_system_code();
31
32 BOOST_TEST_EQ( e1, e2 );
33
34 BOOST_TEST_EQ( hash_value( e1 ), hash_value( e2 ) );
35 }
36
37 {
38 error_code e1 = lib1::get_generic_code();
39 error_code e2 = lib2::get_generic_code();
40
41 BOOST_TEST_EQ( e1, e2 );
42
43 BOOST_TEST_EQ( hash_value( e1 ), hash_value( e2 ) );
44 }
45
46 return boost::report_errors();
47}
48

source code of boost/libs/system/test/single_instance_test.cpp