| /* |
| * 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 fun_ref.hpp |
| * \author Andrey Semashev |
| * \date 30.03.2008 |
| * |
| * This header contains function object reference adapter. The adapter stores a reference to external |
| * function object and forwards all calls to the referred function. |
| */ |
| |
| #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_FUN_REF_HPP_INCLUDED_ |
| #define BOOST_LOG_UTILITY_FUNCTIONAL_FUN_REF_HPP_INCLUDED_ |
| |
| #include <boost/log/detail/config.hpp> |
| #include <boost/log/detail/header.hpp> |
| |
| #ifdef BOOST_HAS_PRAGMA_ONCE |
| #pragma once |
| #endif |
| |
| namespace boost { |
| |
| BOOST_LOG_OPEN_NAMESPACE |
| |
| //! Reference wrapper for function objects |
| template< typename FunT > |
| struct function_reference_wrapper |
| { |
| typedef typename FunT::result_type result_type; |
| |
| explicit function_reference_wrapper(FunT& fun) : m_Fun(fun) {} |
| |
| result_type operator() () const |
| { |
| return m_Fun(); |
| } |
| |
| #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) |
| template< typename... ArgsT > |
| result_type operator() (ArgsT const&... args) const |
| { |
| return m_Fun(args...); |
| } |
| #else |
| template< typename T > |
| result_type operator() (T const& arg) const |
| { |
| return m_Fun(arg); |
| } |
| |
| template< typename T1, typename T2 > |
| result_type operator() (T1 const& arg1, T2 const& arg2) const |
| { |
| return m_Fun(arg1, arg2); |
| } |
| #endif |
| |
| private: |
| FunT& m_Fun; |
| }; |
| |
| template< typename FunT > |
| BOOST_FORCEINLINE function_reference_wrapper< FunT > fun_ref(FunT& fun) |
| { |
| return function_reference_wrapper< FunT >(fun); |
| } |
| |
| BOOST_LOG_CLOSE_NAMESPACE // namespace log |
| |
| } // namespace boost |
| |
| #include <boost/log/detail/footer.hpp> |
| |
| #endif // BOOST_LOG_UTILITY_FUNCTIONAL_FUN_REF_HPP_INCLUDED_ |