Chris@16: /*
Chris@101:  *          Copyright Andrey Semashev 2007 - 2015.
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  *    (See accompanying file LICENSE_1_0.txt or copy at
Chris@16:  *          http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  */
Chris@16: /*!
Chris@16:  * \file   basic_sink_backend.hpp
Chris@16:  * \author Andrey Semashev
Chris@16:  * \date   04.11.2007
Chris@16:  *
Chris@16:  * The header contains implementation of base classes for sink backends.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_LOG_SINKS_BASIC_SINK_BACKEND_HPP_INCLUDED_
Chris@16: #define BOOST_LOG_SINKS_BASIC_SINK_BACKEND_HPP_INCLUDED_
Chris@16: 
Chris@16: #include <string>
Chris@16: #include <boost/type_traits/is_same.hpp>
Chris@16: #include <boost/log/detail/config.hpp>
Chris@16: #include <boost/log/sinks/frontend_requirements.hpp>
Chris@16: #include <boost/log/core/record_view.hpp>
Chris@16: #include <boost/log/attributes/attribute_value_set.hpp>
Chris@16: #include <boost/log/detail/header.hpp>
Chris@16: 
Chris@16: #ifdef BOOST_HAS_PRAGMA_ONCE
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: BOOST_LOG_OPEN_NAMESPACE
Chris@16: 
Chris@16: namespace sinks {
Chris@16: 
Chris@16: /*!
Chris@16:  * \brief Base class for a logging sink backend
Chris@16:  *
Chris@16:  * The \c basic_sink_backend class template defines a number of types that
Chris@16:  * all sink backends are required to define. All sink backends have to derive from the class.
Chris@16:  */
Chris@16: template< typename FrontendRequirementsT >
Chris@16: struct basic_sink_backend
Chris@16: {
Chris@16:     //! Frontend requirements tag
Chris@16:     typedef FrontendRequirementsT frontend_requirements;
Chris@16: 
Chris@16:     BOOST_DEFAULTED_FUNCTION(basic_sink_backend(), {})
Chris@16: 
Chris@16:     BOOST_DELETED_FUNCTION(basic_sink_backend(basic_sink_backend const&))
Chris@16:     BOOST_DELETED_FUNCTION(basic_sink_backend& operator= (basic_sink_backend const&))
Chris@16: };
Chris@16: 
Chris@16: /*!
Chris@16:  * \brief A base class for a logging sink backend with message formatting support
Chris@16:  *
Chris@16:  * The \c basic_formatted_sink_backend class template indicates to the frontend that
Chris@16:  * the backend requires logging record formatting.
Chris@16:  *
Chris@16:  * The class allows to request encoding conversion in case if the sink backend
Chris@16:  * requires the formatted string in some particular encoding (e.g. if underlying API
Chris@16:  * supports only narrow or wide characters). In order to perform conversion one
Chris@16:  * should specify the desired final character type in the \c TargetCharT template
Chris@16:  * parameter.
Chris@16:  */
Chris@16: template<
Chris@16:     typename CharT,
Chris@16:     typename FrontendRequirementsT = synchronized_feeding
Chris@16: >
Chris@16: struct basic_formatted_sink_backend :
Chris@16:     public basic_sink_backend<
Chris@16:         typename combine_requirements< FrontendRequirementsT, formatted_records >::type
Chris@16:     >
Chris@16: {
Chris@16: private:
Chris@16:     typedef basic_sink_backend<
Chris@16:         typename combine_requirements< FrontendRequirementsT, formatted_records >::type
Chris@16:     > base_type;
Chris@16: 
Chris@16: public:
Chris@16:     //! Character type
Chris@16:     typedef CharT char_type;
Chris@16:     //! Formatted string type
Chris@16:     typedef std::basic_string< char_type > string_type;
Chris@16:     //! Frontend requirements
Chris@16:     typedef typename base_type::frontend_requirements frontend_requirements;
Chris@16: };
Chris@16: 
Chris@16: } // namespace sinks
Chris@16: 
Chris@16: BOOST_LOG_CLOSE_NAMESPACE // namespace log
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #include <boost/log/detail/footer.hpp>
Chris@16: 
Chris@16: #endif // BOOST_LOG_SINKS_BASIC_SINK_BACKEND_HPP_INCLUDED_