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128 lines
3.8 KiB
C++
128 lines
3.8 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 log/trivial.hpp
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* \author Andrey Semashev
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* \date 07.11.2009
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*
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* This header defines tools for trivial logging support
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*/
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#ifndef BOOST_LOG_TRIVIAL_HPP_INCLUDED_
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#define BOOST_LOG_TRIVIAL_HPP_INCLUDED_
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#include <iosfwd>
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#include <ostream>
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#include <boost/log/detail/config.hpp>
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#include <boost/log/keywords/severity.hpp>
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#include <boost/log/sources/severity_logger.hpp>
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#include <boost/log/sources/record_ostream.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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#if !defined(BOOST_LOG_USE_CHAR)
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#error Boost.Log: Trivial logging is available for narrow-character builds only. Use advanced initialization routines to setup wide-character logging.
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#endif
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace trivial {
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//! Trivial severity levels
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enum severity_level
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{
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trace,
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debug,
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info,
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warning,
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error,
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fatal
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};
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//! Returns stringized enumeration value or \c NULL, if the value is not valid
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BOOST_LOG_API const char* to_string(severity_level lvl);
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//! Outputs stringized representation of the severity level to the stream
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template< typename CharT, typename TraitsT >
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inline std::basic_ostream< CharT, TraitsT >& operator<< (
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std::basic_ostream< CharT, TraitsT >& strm, severity_level lvl)
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{
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const char* str = boost::log::trivial::to_string(lvl);
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if (str)
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strm << str;
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else
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strm << static_cast< int >(lvl);
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return strm;
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}
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//! Reads stringized representation of the severity level from the stream
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template< typename CharT, typename TraitsT >
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BOOST_LOG_API std::basic_istream< CharT, TraitsT >& operator>> (
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std::basic_istream< CharT, TraitsT >& strm, severity_level& lvl);
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//! Trivial logger type
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#if !defined(BOOST_LOG_NO_THREADS)
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typedef sources::severity_logger_mt< severity_level > logger_type;
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#else
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typedef sources::severity_logger< severity_level > logger_type;
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#endif
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/*!
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* \brief Trivial logger tag
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*
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* This tag can be used to acquire the logger that is used with lrivial logging macros.
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* This may be useful when the logger is used with other macros which require a logger.
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*/
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struct logger
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{
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//! Logger type
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typedef trivial::logger_type logger_type;
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/*!
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* Returns a reference to the trivial logger instance
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*/
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static BOOST_LOG_API logger_type& get();
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// Implementation details - never use these
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#if !defined(BOOST_LOG_DOXYGEN_PASS)
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enum registration_line_t { registration_line = __LINE__ };
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static const char* registration_file() { return __FILE__; }
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static BOOST_LOG_API logger_type construct_logger();
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#endif
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};
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/*!
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* The macro is used to initiate logging. The \c lvl argument of the macro specifies one of the following
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* severity levels: \c trace, \c debug, \c info, \c warning, \c error or \c fatal (see \c severity_level enum).
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* Following the macro, there may be a streaming expression that composes the record message string. For example:
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*
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* \code
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* BOOST_LOG_TRIVIAL(info) << "Hello, world!";
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* \endcode
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*/
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#define BOOST_LOG_TRIVIAL(lvl)\
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BOOST_LOG_STREAM_WITH_PARAMS(::boost::log::trivial::logger::get(),\
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(::boost::log::keywords::severity = ::boost::log::trivial::lvl))
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} // namespace trivial
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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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#if defined(BOOST_LOG_EXPRESSIONS_KEYWORD_HPP_INCLUDED_)
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#include <boost/log/detail/trivial_keyword.hpp>
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#endif
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#endif // BOOST_LOG_TRIVIAL_HPP_INCLUDED_
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