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1 | // |
2 | // async_result.hpp | |
3 | // ~~~~~~~~~~~~~~~~ | |
4 | // | |
5 | // Copyright (c) 2003-2017 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 | #ifndef ARCHETYPES_DEPRECATED_ASYNC_RESULT_HPP | |
12 | #define ARCHETYPES_DEPRECATED_ASYNC_RESULT_HPP | |
13 | ||
14 | #include <boost/asio/async_result.hpp> | |
15 | ||
16 | #if !defined(BOOST_ASIO_NO_DEPRECATED) | |
17 | ||
18 | #include <boost/asio/handler_type.hpp> | |
19 | ||
20 | namespace archetypes { | |
21 | ||
22 | struct deprecated_lazy_handler | |
23 | { | |
24 | }; | |
25 | ||
26 | struct deprecated_concrete_handler | |
27 | { | |
28 | deprecated_concrete_handler(deprecated_lazy_handler) | |
29 | { | |
30 | } | |
31 | ||
32 | template <typename Arg1> | |
33 | void operator()(Arg1) | |
34 | { | |
35 | } | |
36 | ||
37 | template <typename Arg1, typename Arg2> | |
38 | void operator()(Arg1, Arg2) | |
39 | { | |
40 | } | |
41 | ||
42 | #if defined(BOOST_ASIO_HAS_MOVE) | |
43 | deprecated_concrete_handler(deprecated_concrete_handler&&) {} | |
44 | private: | |
45 | deprecated_concrete_handler(const deprecated_concrete_handler&); | |
46 | #endif // defined(BOOST_ASIO_HAS_MOVE) | |
47 | }; | |
48 | ||
49 | } // namespace archetypes | |
50 | ||
51 | namespace boost { | |
52 | namespace asio { | |
53 | ||
54 | template <typename Signature> | |
55 | struct handler_type<archetypes::deprecated_lazy_handler, Signature> | |
56 | { | |
57 | typedef archetypes::deprecated_concrete_handler type; | |
58 | }; | |
59 | ||
60 | template <> | |
61 | class async_result<archetypes::deprecated_concrete_handler> | |
62 | { | |
63 | public: | |
64 | // The return type of the initiating function. | |
65 | typedef double type; | |
66 | ||
67 | // Construct an async_result from a given handler. | |
68 | explicit async_result(archetypes::deprecated_concrete_handler&) | |
69 | { | |
70 | } | |
71 | ||
72 | // Obtain the value to be returned from the initiating function. | |
73 | type get() | |
74 | { | |
75 | return 42; | |
76 | } | |
77 | }; | |
78 | ||
79 | } // namespace asio | |
80 | } // namespace boost | |
81 | ||
82 | #endif // !defined(BOOST_ASIO_NO_DEPRECATED) | |
83 | ||
84 | #endif // ARCHETYPES_DEPRECATED_ASYNC_RESULT_HPP |