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   bind_to_log.hpp
Chris@16:  * \author Andrey Semashev
Chris@16:  * \date   06.11.2012
Chris@16:  *
Chris@16:  * This header contains a function object that puts the received value to the bound stream using the \c to_log manipulator.
Chris@16:  * This is a lightweight alternative to what Boost.Phoenix and Boost.Lambda provides.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_
Chris@16: #define BOOST_LOG_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_
Chris@16: 
Chris@16: #include <boost/log/detail/config.hpp>
Chris@16: #include <boost/log/utility/functional/bind.hpp>
Chris@16: #include <boost/log/utility/manipulators/to_log.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: //! The function object that outputs its second operand to the first one
Chris@16: template< typename TagT = void >
Chris@16: struct to_log_fun
Chris@16: {
Chris@16:     typedef void result_type;
Chris@16: 
Chris@16:     template< typename StreamT, typename T >
Chris@16:     void operator() (StreamT& strm, T const& val) const
Chris@16:     {
Chris@16:         strm << boost::log::to_log< TagT >(val);
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: //! The function object that outputs its second operand to the first one
Chris@16: template< >
Chris@16: struct to_log_fun< void >
Chris@16: {
Chris@16:     typedef void result_type;
Chris@16: 
Chris@16:     template< typename StreamT, typename T >
Chris@16:     void operator() (StreamT& strm, T const& val) const
Chris@16:     {
Chris@16:         strm << boost::log::to_log(val);
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: template< typename StreamT >
Chris@16: BOOST_FORCEINLINE binder1st< to_log_fun< >, StreamT& > bind_to_log(StreamT& strm)
Chris@16: {
Chris@16:     return binder1st< to_log_fun< >, StreamT& >(to_log_fun< >(), strm);
Chris@16: }
Chris@16: 
Chris@16: template< typename TagT, typename StreamT >
Chris@16: BOOST_FORCEINLINE binder1st< to_log_fun< TagT >, StreamT& > bind_to_log(StreamT& strm)
Chris@16: {
Chris@16:     return binder1st< to_log_fun< TagT >, StreamT& >(to_log_fun< TagT >(), strm);
Chris@16: }
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_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_