boost/log/utility/open_mode.hpp
/* * Copyright Andrey Semashev 2016. * 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 open_mode.hpp * \author Andrey Semashev * \date 01.01.2016 * * The header defines resource opening modes. */ #ifndef BOOST_LOG_UTILITY_OPEN_MODE_HPP_INCLUDED_ #define BOOST_LOG_UTILITY_OPEN_MODE_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 namespace open_mode { //! Create a new resource; fail if exists already struct create_only_tag {} const create_only = create_only_tag(); //! Opens an existing resource; fail if not exist struct open_only_tag {} const open_only = open_only_tag(); //! Creates a new resource or opens an existing one struct open_or_create_tag {} const open_or_create = open_or_create_tag(); } // namespace open_mode BOOST_LOG_CLOSE_NAMESPACE // namespace log } // namespace boost #include <boost/log/detail/footer.hpp> #endif // BOOST_LOG_UTILITY_OPEN_MODE_HPP_INCLUDED_