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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_