text: /*
   *          Copyright Andrey Semashev 2007 - 2015.
   * Distributed under the Boost Software License, Version 1.0.
   *    (See accompanying file LICENSE_1_0.txt or copy at
   *          http://www.boost.org/LICENSE_1_0.txt)
   */
  /*!
   * \file   unique_identifier_name.hpp
   * \author Andrey Semashev
   * \date   30.04.2008
   *
   * The header contains \c BOOST_LOG_UNIQUE_IDENTIFIER_NAME macro definition.
   */
  
  #ifndef BOOST_LOG_UTILITY_UNIQUE_IDENTIFIER_NAME_HPP_INCLUDED_
  #define BOOST_LOG_UTILITY_UNIQUE_IDENTIFIER_NAME_HPP_INCLUDED_
  
  #include <boost/preprocessor/cat.hpp>
  #include <boost/log/detail/config.hpp>
  
  #ifdef BOOST_HAS_PRAGMA_ONCE
  #pragma once
  #endif
  
  #ifndef BOOST_LOG_DOXYGEN_PASS
  
  #define BOOST_LOG_UNIQUE_IDENTIFIER_NAME_INTERNAL_(prefix, postfix)\
      BOOST_PP_CAT(prefix, postfix)
  #define BOOST_LOG_UNIQUE_IDENTIFIER_NAME_INTERNAL(prefix, postfix)\
      BOOST_LOG_UNIQUE_IDENTIFIER_NAME_INTERNAL_(prefix, postfix)
  
  #endif // BOOST_LOG_DOXYGEN_PASS
  
  /*!
   * \def BOOST_LOG_UNIQUE_IDENTIFIER_NAME(prefix)
   *
   * Constructs a unique (in the current file scope) token that can be used as a variable name.
   * The name will contain a prefix passed in the \a prefix argument. This allows to use the
   * macro multiple times on a single line.
   */
  
  // In VC 7.0 and later when compiling with /ZI option __LINE__ macro is corrupted
  #ifdef BOOST_MSVC
  #  define BOOST_LOG_UNIQUE_IDENTIFIER_NAME(prefix)\
      BOOST_LOG_UNIQUE_IDENTIFIER_NAME_INTERNAL(prefix, __COUNTER__)
  #else
  #  define BOOST_LOG_UNIQUE_IDENTIFIER_NAME(prefix)\
      BOOST_LOG_UNIQUE_IDENTIFIER_NAME_INTERNAL(prefix, __LINE__)
  #endif // BOOST_MSVC
  
  #endif // BOOST_LOG_UTILITY_UNIQUE_IDENTIFIER_NAME_HPP_INCLUDED_
  