text: # /* Copyright (C) 2001
  #  * Housemarque Oy
  #  * http://www.housemarque.com
  #  *
  #  * 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)
  #  */
  #
  # /* Revised by Paul Mensonides (2002) */
  #
  # /* See http://www.boost.org for most recent version. */
  #
  # ifndef BOOST_PREPROCESSOR_LOGICAL_XOR_HPP
  # define BOOST_PREPROCESSOR_LOGICAL_XOR_HPP
  #
  # include <boost/preprocessor/config/config.hpp>
  # include <boost/preprocessor/logical/bool.hpp>
  # include <boost/preprocessor/logical/bitxor.hpp>
  #
  # /* BOOST_PP_XOR */
  #
  # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
  #    define BOOST_PP_XOR(p, q) BOOST_PP_BITXOR(BOOST_PP_BOOL(p), BOOST_PP_BOOL(q))
  # else
  #    define BOOST_PP_XOR(p, q) BOOST_PP_XOR_I(p, q)
  #    define BOOST_PP_XOR_I(p, q) BOOST_PP_BITXOR(BOOST_PP_BOOL(p), BOOST_PP_BOOL(q))
  # endif
  #
  # endif
  