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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 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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