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