47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
/*
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* Copyright Andrey Semashev 2016.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*!
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* \file open_mode.hpp
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* \author Andrey Semashev
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* \date 01.01.2016
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*
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* The header defines resource opening modes.
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*/
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#ifndef BOOST_LOG_UTILITY_OPEN_MODE_HPP_INCLUDED_
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#define BOOST_LOG_UTILITY_OPEN_MODE_HPP_INCLUDED_
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#include <boost/log/detail/config.hpp>
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#include <boost/log/detail/header.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace open_mode {
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//! Create a new resource; fail if exists already
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struct create_only_tag {} const create_only = create_only_tag();
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//! Opens an existing resource; fail if not exist
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struct open_only_tag {} const open_only = open_only_tag();
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//! Creates a new resource or opens an existing one
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struct open_or_create_tag {} const open_or_create = open_or_create_tag();
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} // namespace open_mode
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#include <boost/log/detail/footer.hpp>
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#endif // BOOST_LOG_UTILITY_OPEN_MODE_HPP_INCLUDED_
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