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/*
* Copyright Andrey Semashev 2007 - 2014.
* 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 bind_to_log.hpp
* \author Andrey Semashev
* \date 06.11.2012
*
* This header contains a function object that puts the received value to the bound stream using the \c to_log manipulator.
* This is a lightweight alternative to what Boost.Phoenix and Boost.Lambda provides.
*/
#ifndef BOOST_LOG_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_
#define BOOST_LOG_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_
#include <boost/log/detail/config.hpp>
#include <boost/log/utility/functional/bind.hpp>
#include <boost/log/utility/manipulators/to_log.hpp>
#include <boost/log/detail/header.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
namespace boost {
BOOST_LOG_OPEN_NAMESPACE
//! The function object that outputs its second operand to the first one
template< typename TagT = void >
struct to_log_fun
{
typedef void result_type;
template< typename StreamT, typename T >
void operator() (StreamT& strm, T const& val) const
{
strm << boost::log::to_log< TagT >(val);
}
};
//! The function object that outputs its second operand to the first one
template< >
struct to_log_fun< void >
{
typedef void result_type;
template< typename StreamT, typename T >
void operator() (StreamT& strm, T const& val) const
{
strm << boost::log::to_log(val);
}
};
template< typename StreamT >
BOOST_FORCEINLINE binder1st< to_log_fun< >, StreamT& > bind_to_log(StreamT& strm)
{
return binder1st< to_log_fun< >, StreamT& >(to_log_fun< >(), strm);
}
template< typename TagT, typename StreamT >
BOOST_FORCEINLINE binder1st< to_log_fun< TagT >, StreamT& > bind_to_log(StreamT& strm)
{
return binder1st< to_log_fun< TagT >, StreamT& >(to_log_fun< TagT >(), strm);
}
BOOST_LOG_CLOSE_NAMESPACE // namespace log
} // namespace boost
#include <boost/log/detail/footer.hpp>
#endif // BOOST_LOG_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_
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