| /* |
| * 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 nop.hpp |
| * \author Andrey Semashev |
| * \date 30.03.2008 |
| * |
| * This header contains a function object that does nothing. |
| */ |
| |
| #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_NOP_HPP_INCLUDED_ |
| #define BOOST_LOG_UTILITY_FUNCTIONAL_NOP_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 |
| |
| //! The function object that does nothing |
| struct nop |
| { |
| typedef void result_type; |
| |
| void operator() () const BOOST_NOEXCEPT {} |
| |
| #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) |
| template< typename... ArgsT > |
| void operator() (ArgsT const&...) const BOOST_NOEXCEPT {} |
| #else |
| template< typename T > |
| void operator() (T const&) const BOOST_NOEXCEPT {} |
| template< typename T1, typename T2 > |
| void operator() (T1 const&, T2 const&) const BOOST_NOEXCEPT {} |
| template< typename T1, typename T2, typename T3 > |
| void operator() (T1 const&, T2 const&, T3 const&) const BOOST_NOEXCEPT {} |
| #endif |
| }; |
| |
| BOOST_LOG_CLOSE_NAMESPACE // namespace log |
| |
| } // namespace boost |
| |
| #include <boost/log/detail/footer.hpp> |
| |
| #endif // BOOST_LOG_UTILITY_FUNCTIONAL_NOP_HPP_INCLUDED_ |