1 /* 2 * Copyright Andrey Semashev 2007 - 2015. 3 * Distributed under the Boost Software License, Version 1.0. 4 * (See accompanying file LICENSE_1_0.txt or copy at 5 * http://www.boost.org/LICENSE_1_0.txt) 6 */ 7 /*! 8 * \file bind_output.hpp 9 * \author Andrey Semashev 10 * \date 30.03.2008 11 * 12 * This header contains a function object that puts the received value to the bound stream. 13 * This is a lightweight alternative to what Boost.Phoenix and Boost.Lambda provides. 14 */ 15 16 #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_BIND_OUTPUT_HPP_INCLUDED_ 17 #define BOOST_LOG_UTILITY_FUNCTIONAL_BIND_OUTPUT_HPP_INCLUDED_ 18 19 #include <boost/log/detail/config.hpp> 20 #include <boost/log/utility/functional/bind.hpp> 21 #include <boost/log/detail/header.hpp> 22 23 #ifdef BOOST_HAS_PRAGMA_ONCE 24 #pragma once 25 #endif 26 27 namespace boost { 28 29 BOOST_LOG_OPEN_NAMESPACE 30 31 //! The function object that outputs its second operand to the first one 32 struct output_fun 33 { 34 typedef void result_type; 35 36 template< typename StreamT, typename T > operator ()boost::output_fun37 void operator() (StreamT& strm, T const& val) const 38 { 39 strm << val; 40 } 41 }; 42 43 template< typename StreamT > bind_output(StreamT & strm)44BOOST_FORCEINLINE binder1st< output_fun, StreamT& > bind_output(StreamT& strm) 45 { 46 return binder1st< output_fun, StreamT& >(output_fun(), strm); 47 } 48 49 BOOST_LOG_CLOSE_NAMESPACE // namespace log 50 51 } // namespace boost 52 53 #include <boost/log/detail/footer.hpp> 54 55 #endif // BOOST_LOG_UTILITY_FUNCTIONAL_BIND_OUTPUT_HPP_INCLUDED_ 56