Chris@16: /* Chris@101: * Copyright Andrey Semashev 2007 - 2015. Chris@16: * Distributed under the Boost Software License, Version 1.0. Chris@16: * (See accompanying file LICENSE_1_0.txt or copy at Chris@16: * http://www.boost.org/LICENSE_1_0.txt) Chris@16: */ Chris@16: /*! Chris@16: * \file save_result.hpp Chris@16: * \author Andrey Semashev Chris@16: * \date 19.01.2013 Chris@16: * Chris@16: * This header contains function object adapter that saves the result of the adopted function to an external variable. Chris@16: */ Chris@16: Chris@16: #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_SAVE_RESULT_HPP_INCLUDED_ Chris@16: #define BOOST_LOG_UTILITY_FUNCTIONAL_SAVE_RESULT_HPP_INCLUDED_ Chris@16: Chris@16: #include Chris@16: #include Chris@16: Chris@16: #ifdef BOOST_HAS_PRAGMA_ONCE Chris@16: #pragma once Chris@16: #endif Chris@16: Chris@16: namespace boost { Chris@16: Chris@16: BOOST_LOG_OPEN_NAMESPACE Chris@16: Chris@16: //! Function object wrapper for saving the adopted function object result Chris@16: template< typename FunT, typename AssigneeT > Chris@16: struct save_result_wrapper Chris@16: { Chris@16: typedef void result_type; Chris@16: Chris@16: save_result_wrapper(FunT fun, AssigneeT& assignee) : m_fun(fun), m_assignee(assignee) {} Chris@16: Chris@16: template< typename ArgT > Chris@16: result_type operator() (ArgT const& arg) const Chris@16: { Chris@16: m_assignee = m_fun(arg); Chris@16: } Chris@16: Chris@16: private: Chris@16: FunT m_fun; Chris@16: AssigneeT& m_assignee; Chris@16: }; Chris@16: Chris@16: template< typename FunT, typename AssigneeT > Chris@16: BOOST_FORCEINLINE save_result_wrapper< FunT, AssigneeT > save_result(FunT const& fun, AssigneeT& assignee) Chris@16: { Chris@16: return save_result_wrapper< FunT, AssigneeT >(fun, assignee); Chris@16: } Chris@16: Chris@16: BOOST_LOG_CLOSE_NAMESPACE // namespace log Chris@16: Chris@16: } // namespace boost Chris@16: Chris@16: #include Chris@16: Chris@16: #endif // BOOST_LOG_UTILITY_FUNCTIONAL_SAVE_RESULT_HPP_INCLUDED_