ceph/src/boost/boost/log/utility/unique_identifier_name.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   unique_identifier_name.hpp
   9  * \author Andrey Semashev
  10  * \date   30.04.2008
  11  *
  12  * The header contains \c BOOST_LOG_UNIQUE_IDENTIFIER_NAME macro definition.
  13  */
  14
  15 #ifndef BOOST_LOG_UTILITY_UNIQUE_IDENTIFIER_NAME_HPP_INCLUDED_
  16 #define BOOST_LOG_UTILITY_UNIQUE_IDENTIFIER_NAME_HPP_INCLUDED_
  17
  18 #include <boost/preprocessor/cat.hpp>
  19 #include <boost/log/detail/config.hpp>
  20
  21 #ifdef BOOST_HAS_PRAGMA_ONCE
  22 #pragma once
  23 #endif
  24
  25 #ifndef BOOST_LOG_DOXYGEN_PASS
  26
  27 #define BOOST_LOG_UNIQUE_IDENTIFIER_NAME_INTERNAL_(prefix, postfix)\
  28     BOOST_PP_CAT(prefix, postfix)
  29 #define BOOST_LOG_UNIQUE_IDENTIFIER_NAME_INTERNAL(prefix, postfix)\
  30     BOOST_LOG_UNIQUE_IDENTIFIER_NAME_INTERNAL_(prefix, postfix)
  31
  32 #endif // BOOST_LOG_DOXYGEN_PASS
  33
  34 /*!
  35  * \def BOOST_LOG_UNIQUE_IDENTIFIER_NAME(prefix)
  36  *
  37  * Constructs a unique (in the current file scope) token that can be used as a variable name.
  38  * The name will contain a prefix passed in the \a prefix argument. This allows to use the
  39  * macro multiple times on a single line.
  40  */
  41
  42 // In VC 7.0 and later when compiling with /ZI option __LINE__ macro is corrupted
  43 #ifdef BOOST_MSVC
  44 #  define BOOST_LOG_UNIQUE_IDENTIFIER_NAME(prefix)\
  45     BOOST_LOG_UNIQUE_IDENTIFIER_NAME_INTERNAL(prefix, __COUNTER__)
  46 #else
  47 #  define BOOST_LOG_UNIQUE_IDENTIFIER_NAME(prefix)\
  48     BOOST_LOG_UNIQUE_IDENTIFIER_NAME_INTERNAL(prefix, __LINE__)
  49 #endif // BOOST_MSVC
  50
  51 #endif // BOOST_LOG_UTILITY_UNIQUE_IDENTIFIER_NAME_HPP_INCLUDED_