98 lines
2.9 KiB
C++
98 lines
2.9 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 basic_sink_backend.hpp
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* \author Andrey Semashev
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* \date 04.11.2007
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*
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* The header contains implementation of base classes for sink backends.
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*/
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#ifndef BOOST_LOG_SINKS_BASIC_SINK_BACKEND_HPP_INCLUDED_
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#define BOOST_LOG_SINKS_BASIC_SINK_BACKEND_HPP_INCLUDED_
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#include <string>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/log/detail/config.hpp>
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#include <boost/log/sinks/frontend_requirements.hpp>
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#include <boost/log/core/record_view.hpp>
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#include <boost/log/attributes/attribute_value_set.hpp>
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#include <boost/log/detail/header.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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BOOST_LOG_OPEN_NAMESPACE
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namespace sinks {
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/*!
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* \brief Base class for a logging sink backend
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*
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* The \c basic_sink_backend class template defines a number of types that
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* all sink backends are required to define. All sink backends have to derive from the class.
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*/
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template< typename FrontendRequirementsT >
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struct basic_sink_backend
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{
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//! Frontend requirements tag
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typedef FrontendRequirementsT frontend_requirements;
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BOOST_DEFAULTED_FUNCTION(basic_sink_backend(), {})
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BOOST_DELETED_FUNCTION(basic_sink_backend(basic_sink_backend const&))
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BOOST_DELETED_FUNCTION(basic_sink_backend& operator= (basic_sink_backend const&))
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};
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/*!
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* \brief A base class for a logging sink backend with message formatting support
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*
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* The \c basic_formatted_sink_backend class template indicates to the frontend that
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* the backend requires logging record formatting.
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*
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* The class allows to request encoding conversion in case if the sink backend
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* requires the formatted string in some particular encoding (e.g. if underlying API
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* supports only narrow or wide characters). In order to perform conversion one
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* should specify the desired final character type in the \c TargetCharT template
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* parameter.
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*/
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template<
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typename CharT,
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typename FrontendRequirementsT = synchronized_feeding
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>
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struct basic_formatted_sink_backend :
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public basic_sink_backend<
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typename combine_requirements< FrontendRequirementsT, formatted_records >::type
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>
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{
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private:
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typedef basic_sink_backend<
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typename combine_requirements< FrontendRequirementsT, formatted_records >::type
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> base_type;
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public:
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//! Character type
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typedef CharT char_type;
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//! Formatted string type
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typedef std::basic_string< char_type > string_type;
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//! Frontend requirements
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typedef typename base_type::frontend_requirements frontend_requirements;
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};
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} // namespace sinks
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#include <boost/log/detail/footer.hpp>
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#endif // BOOST_LOG_SINKS_BASIC_SINK_BACKEND_HPP_INCLUDED_
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