1/*
2 * Copyright Andrey Semashev 2007 - 2015.
3 * Distributed under the Boost Software License, Version 1.0.
4 * (See accompanying file LICENSE_1_0.txt or copy at
5 * http://www.boost.org/LICENSE_1_0.txt)
6 */
7/*!
8 * \file attr_fwd.hpp
9 * \author Andrey Semashev
10 * \date 21.07.2012
11 *
12 * The header contains forward declaration of a generic attribute placeholder in template expressions.
13 */
14
15#ifndef BOOST_LOG_EXPRESSIONS_ATTR_FWD_HPP_INCLUDED_
16#define BOOST_LOG_EXPRESSIONS_ATTR_FWD_HPP_INCLUDED_
17
18#include <boost/log/detail/config.hpp>
19#include <boost/log/attributes/fallback_policy_fwd.hpp>
20
21#ifdef BOOST_HAS_PRAGMA_ONCE
22#pragma once
23#endif
24
25namespace boost {
26
27#ifndef BOOST_LOG_DOXYGEN_PASS
28
29namespace phoenix {
30
31template< typename >
32struct actor;
33
34} // namespace phoenix
35
36#endif
37
38BOOST_LOG_OPEN_NAMESPACE
39
40namespace expressions {
41
42/*!
43 * An attribute value extraction terminal
44 */
45template<
46 typename T,
47 typename FallbackPolicyT = fallback_to_none,
48 typename TagT = void
49>
50class attribute_terminal;
51
52/*!
53 * An attribute value extraction terminal actor
54 */
55template<
56 typename T,
57 typename FallbackPolicyT = fallback_to_none,
58 typename TagT = void,
59 template< typename > class ActorT = phoenix::actor
60>
61class attribute_actor;
62
63} // namespace expressions
64
65BOOST_LOG_CLOSE_NAMESPACE // namespace log
66
67} // namespace boost
68
69#endif // BOOST_LOG_EXPRESSIONS_ATTR_FWD_HPP_INCLUDED_
70

source code of boost/libs/log/include/boost/log/expressions/attr_fwd.hpp