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20effc67 TL |
1 | // |
2 | // cpp11/query_member.cpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
1e59de90 | 5 | // Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
20effc67 TL |
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 | constexpr int query(prop) const { return 123; } | |
21 | }; | |
22 | ||
23 | namespace boost { | |
24 | namespace asio { | |
25 | ||
26 | template<> | |
27 | struct is_applicable_property<object, prop> | |
28 | { | |
29 | static constexpr bool value = true; | |
30 | }; | |
31 | ||
32 | } // namespace asio | |
33 | } // namespace boost | |
34 | ||
35 | int main() | |
36 | { | |
37 | object o1 = {}; | |
38 | int result1 = boost::asio::query(o1, prop()); | |
39 | assert(result1 == 123); | |
40 | (void)result1; | |
41 | ||
42 | const object o2 = {}; | |
43 | int result2 = boost::asio::query(o2, prop()); | |
44 | assert(result2 == 123); | |
45 | (void)result2; | |
46 | ||
47 | constexpr object o3 = {}; | |
48 | constexpr int result3 = boost::asio::query(o3, prop()); | |
49 | assert(result3 == 123); | |
50 | (void)result3; | |
51 | } |