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/*
* Copyright Andrey Semashev 2007 - 2015.
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*/
/*!
* \file attr_fwd.hpp
* \author Andrey Semashev
* \date 21.07.2012
*
* The header contains forward declaration of a generic attribute placeholder in template expressions.
*/
#ifndef BOOST_LOG_EXPRESSIONS_ATTR_FWD_HPP_INCLUDED_
#define BOOST_LOG_EXPRESSIONS_ATTR_FWD_HPP_INCLUDED_
#include <boost/log/detail/config.hpp>
#include <boost/log/attributes/fallback_policy_fwd.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
namespace boost {
#ifndef BOOST_LOG_DOXYGEN_PASS
namespace phoenix {
template< typename >
struct actor;
} // namespace phoenix
#endif
BOOST_LOG_OPEN_NAMESPACE
namespace expressions {
/*!
* An attribute value extraction terminal
*/
template<
typename T,
typename FallbackPolicyT = fallback_to_none,
typename TagT = void
>
class attribute_terminal;
/*!
* An attribute value extraction terminal actor
*/
template<
typename T,
typename FallbackPolicyT = fallback_to_none,
typename TagT = void,
template< typename > class ActorT = phoenix::actor
>
class attribute_actor;
} // namespace expressions
BOOST_LOG_CLOSE_NAMESPACE // namespace log
} // namespace boost
#endif // BOOST_LOG_EXPRESSIONS_ATTR_FWD_HPP_INCLUDED_
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