# /* 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_ARITHMETIC_SUB_HPP

# define BOOST_PREPROCESSOR_ARITHMETIC_SUB_HPP

#

# include <boost/preprocessor/arithmetic/dec.hpp>

# include <boost/preprocessor/config/config.hpp>

# include <boost/preprocessor/control/while.hpp>

# include <boost/preprocessor/tuple/elem.hpp>

#

# /* BOOST_PP_SUB */

#

# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()

#    define BOOST_PP_SUB(x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE(BOOST_PP_SUB_P, BOOST_PP_SUB_O, (x, y)))

# else

#    define BOOST_PP_SUB(x, y) BOOST_PP_SUB_I(x, y)

#    define BOOST_PP_SUB_I(x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE(BOOST_PP_SUB_P, BOOST_PP_SUB_O, (x, y)))

# endif

#

# define BOOST_PP_SUB_P(d, xy) BOOST_PP_TUPLE_ELEM(2, 1, xy)

#

# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()

#    define BOOST_PP_SUB_O(d, xy) BOOST_PP_SUB_O_I xy

# else

#    define BOOST_PP_SUB_O(d, xy) BOOST_PP_SUB_O_I(BOOST_PP_TUPLE_ELEM(2, 0, xy), BOOST_PP_TUPLE_ELEM(2, 1, xy))

# endif

#

# define BOOST_PP_SUB_O_I(x, y) (BOOST_PP_DEC(x), BOOST_PP_DEC(y))

#

# /* BOOST_PP_SUB_D */

#

# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()

#    define BOOST_PP_SUB_D(d, x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE_ ## d(BOOST_PP_SUB_P, BOOST_PP_SUB_O, (x, y)))

# else

#    define BOOST_PP_SUB_D(d, x, y) BOOST_PP_SUB_D_I(d, x, y)

#    define BOOST_PP_SUB_D_I(d, x, y) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE_ ## d(BOOST_PP_SUB_P, BOOST_PP_SUB_O, (x, y)))

# endif

#

# endif

