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1 | // |
2 | // cpp03/can_query_not_applicable_member.cpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
5 | // Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com) | |
6 | // | |
7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
9 | // | |
10 | ||
11 | #include <boost/asio/query.hpp> | |
12 | #include <cassert> | |
13 | ||
14 | struct prop | |
15 | { | |
16 | }; | |
17 | ||
18 | struct object | |
19 | { | |
20 | int query(prop) const { return 123; } | |
21 | }; | |
22 | ||
23 | namespace boost { | |
24 | namespace asio { | |
25 | namespace traits { | |
26 | ||
27 | template<> | |
28 | struct query_member<object, prop> | |
29 | { | |
30 | static const bool is_valid = true; | |
31 | static const bool is_noexcept = true; | |
32 | typedef int result_type; | |
33 | }; | |
34 | ||
35 | } // namespace traits | |
36 | } // namespace asio | |
37 | } // namespace boost | |
38 | ||
39 | int main() | |
40 | { | |
41 | assert((!boost::asio::can_query<object, prop>::value)); | |
42 | assert((!boost::asio::can_query<const object, prop>::value)); | |
43 | } |