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