131 lines
3.3 KiB
C++
131 lines
3.3 KiB
C++
/*
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* Copyright Andrey Semashev 2007 - 2015.
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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 message.hpp
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* \author Andrey Semashev
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* \date 13.07.2012
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*
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* The header contains log message keyword declaration.
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*/
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#ifndef BOOST_LOG_EXPRESSIONS_MESSAGE_HPP_INCLUDED_
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#define BOOST_LOG_EXPRESSIONS_MESSAGE_HPP_INCLUDED_
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#include <string>
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#include <boost/mpl/vector.hpp>
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#include <boost/log/detail/config.hpp>
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#include <boost/log/detail/default_attribute_names.hpp>
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#include <boost/log/expressions/keyword.hpp>
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#include <boost/log/expressions/is_keyword_descriptor.hpp>
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#include <boost/log/attributes/attribute_name.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 expressions {
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namespace tag {
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/*!
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* Generic log message attribute descriptor.
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*/
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struct message :
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public keyword_descriptor
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{
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// The attribute value type here is not essential since message attributes are not intended to be created via the keyword
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typedef void attribute_type;
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#if defined(BOOST_LOG_USE_CHAR) && defined(BOOST_LOG_USE_WCHAR_T)
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typedef mpl::vector2< std::string, std::wstring > value_type;
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#elif defined(BOOST_LOG_USE_CHAR)
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typedef std::string value_type;
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#elif defined(BOOST_LOG_USE_WCHAR_T)
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typedef std::wstring value_type;
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#endif
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static attribute_name get_name() { return boost::log::aux::default_attribute_names::message(); }
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};
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#if defined(BOOST_LOG_USE_CHAR)
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/*!
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* Narrow character log message attribute descriptor.
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*/
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struct smessage :
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public keyword_descriptor
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{
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// The attribute value type here is not essential since message attributes are not intended to be created via the keyword
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typedef void attribute_type;
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typedef std::string value_type;
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static attribute_name get_name() { return boost::log::aux::default_attribute_names::message(); }
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};
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#endif
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#if defined(BOOST_LOG_USE_WCHAR_T)
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/*!
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* Wide character log message attribute descriptor.
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*/
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struct wmessage :
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public keyword_descriptor
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{
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// The attribute value type here is not essential since message attributes are not intended to be created via the keyword
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typedef void attribute_type;
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typedef std::wstring value_type;
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static attribute_name get_name() { return boost::log::aux::default_attribute_names::message(); }
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};
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#endif
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} // namespace tag
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/*!
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* Generic message keyword type.
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*/
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typedef attribute_keyword< tag::message > message_type;
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/*!
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* Generic message keyword.
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*/
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const message_type message = {};
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#if defined(BOOST_LOG_USE_CHAR)
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/*!
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* Narrow message keyword type.
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*/
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typedef attribute_keyword< tag::smessage > smessage_type;
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/*!
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* Narrow message keyword.
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*/
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const smessage_type smessage = {};
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#endif
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#if defined(BOOST_LOG_USE_WCHAR_T)
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/*!
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* Wide message keyword type.
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*/
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typedef attribute_keyword< tag::wmessage > wmessage_type;
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/*!
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* Wide message keyword.
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*/
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const wmessage_type wmessage = {};
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#endif
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} // namespace expressions
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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_EXPRESSIONS_MESSAGE_HPP_INCLUDED_
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