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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 value_visitation_fwd.hpp
9 * \author Andrey Semashev
10 * \date 01.03.2008
11 *
12 * The header contains forward declaration of convenience tools to apply visitors to an attribute value
13 * in the view.
14 */
15
16#ifndef BOOST_LOG_ATTRIBUTES_VALUE_VISITATION_FWD_HPP_INCLUDED_
17#define BOOST_LOG_ATTRIBUTES_VALUE_VISITATION_FWD_HPP_INCLUDED_
18
19#include <boost/log/detail/config.hpp>
20#include <boost/log/attributes/fallback_policy_fwd.hpp>
21
22#ifdef BOOST_HAS_PRAGMA_ONCE
23#pragma once
24#endif
25
26namespace boost {
27
28BOOST_LOG_OPEN_NAMESPACE
29
30/*!
31 * \brief The class represents attribute value visitation result
32 */
33class visitation_result;
34
35/*!
36 * \brief Generic attribute value visitor invoker
37 */
38template< typename T, typename FallbackPolicyT = fallback_to_none >
39class value_visitor_invoker;
40
41BOOST_LOG_CLOSE_NAMESPACE // namespace log
42
43} // namespace boost
44
45#endif // BOOST_LOG_ATTRIBUTES_VALUE_VISITATION_FWD_HPP_INCLUDED_