ceph/src/boost/boost/log/expressions/message.hpp

   1 /*
   2  *          Copyright Andrey Semashev 2007 - 2015.
   3  * Distributed under the Boost Software License, Version 1.0.
   4  *    (See accompanying file LICENSE_1_0.txt or copy at
   5  *          http://www.boost.org/LICENSE_1_0.txt)
   6  */
   7 /*!
   8  * \file   message.hpp
   9  * \author Andrey Semashev
  10  * \date   13.07.2012
  11  *
  12  * The header contains log message keyword declaration.
  13  */
  14
  15 #ifndef BOOST_LOG_EXPRESSIONS_MESSAGE_HPP_INCLUDED_
  16 #define BOOST_LOG_EXPRESSIONS_MESSAGE_HPP_INCLUDED_
  17
  18 #include <string>
  19 #include <boost/mpl/vector.hpp>
  20 #include <boost/log/detail/config.hpp>
  21 #include <boost/log/detail/default_attribute_names.hpp>
  22 #include <boost/log/expressions/keyword.hpp>
  23 #include <boost/log/expressions/is_keyword_descriptor.hpp>
  24 #include <boost/log/attributes/attribute_name.hpp>
  25 #include <boost/log/detail/header.hpp>
  26
  27 #ifdef BOOST_HAS_PRAGMA_ONCE
  28 #pragma once
  29 #endif
  30
  31 namespace boost {
  32
  33 BOOST_LOG_OPEN_NAMESPACE
  34
  35 namespace expressions {
  36
  37 namespace tag {
  38
  39 /*!
  40  * Generic log message attribute descriptor.
  41  */
  42 struct message :
  43     public keyword_descriptor
  44 {
  45     // The attribute value type here is not essential since message attributes are not intended to be created via the keyword
  46     typedef void attribute_type;
  47
  48 #if defined(BOOST_LOG_USE_CHAR) && defined(BOOST_LOG_USE_WCHAR_T)
  49     typedef mpl::vector2< std::string, std::wstring > value_type;
  50 #elif defined(BOOST_LOG_USE_CHAR)
  51     typedef std::string value_type;
  52 #elif defined(BOOST_LOG_USE_WCHAR_T)
  53     typedef std::wstring value_type;
  54 #endif
  55
  56     static attribute_name get_name() { return boost::log::aux::default_attribute_names::message(); }
  57 };
  58
  59 #if defined(BOOST_LOG_USE_CHAR)
  60 /*!
  61  * Narrow character log message attribute descriptor.
  62  */
  63 struct smessage :
  64     public keyword_descriptor
  65 {
  66     // The attribute value type here is not essential since message attributes are not intended to be created via the keyword
  67     typedef void attribute_type;
  68     typedef std::string value_type;
  69
  70     static attribute_name get_name() { return boost::log::aux::default_attribute_names::message(); }
  71 };
  72 #endif
  73
  74 #if defined(BOOST_LOG_USE_WCHAR_T)
  75 /*!
  76  * Wide character log message attribute descriptor.
  77  */
  78 struct wmessage :
  79     public keyword_descriptor
  80 {
  81     // The attribute value type here is not essential since message attributes are not intended to be created via the keyword
  82     typedef void attribute_type;
  83     typedef std::wstring value_type;
  84
  85     static attribute_name get_name() { return boost::log::aux::default_attribute_names::message(); }
  86 };
  87 #endif
  88
  89 } // namespace tag
  90
  91 /*!
  92  * Generic message keyword type.
  93  */
  94 typedef attribute_keyword< tag::message > message_type;
  95 /*!
  96  * Generic message keyword.
  97  */
  98 const message_type message = {};
  99
 100 #if defined(BOOST_LOG_USE_CHAR)
 101 /*!
 102  * Narrow message keyword type.
 103  */
 104 typedef attribute_keyword< tag::smessage > smessage_type;
 105 /*!
 106  * Narrow message keyword.
 107  */
 108 const smessage_type smessage = {};
 109 #endif
 110
 111 #if defined(BOOST_LOG_USE_WCHAR_T)
 112 /*!
 113  * Wide message keyword type.
 114  */
 115 typedef attribute_keyword< tag::wmessage > wmessage_type;
 116 /*!
 117  * Wide message keyword.
 118  */
 119 const wmessage_type wmessage = {};
 120 #endif
 121
 122 } // namespace expressions
 123
 124 BOOST_LOG_CLOSE_NAMESPACE // namespace log
 125
 126 } // namespace boost
 127
 128 #include <boost/log/detail/footer.hpp>
 129
 130 #endif // BOOST_LOG_EXPRESSIONS_MESSAGE_HPP_INCLUDED_