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