1 # /* Copyright (C) 2001
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3 # * http://www.housemarque.com
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5 # * Distributed under the Boost Software License, Version 1.0. (See
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6 # * accompanying file LICENSE_1_0.txt or copy at
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7 # * http://www.boost.org/LICENSE_1_0.txt)
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10 # /* Revised by Paul Mensonides (2002) */
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12 # /* See http://www.boost.org for most recent version. */
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14 # ifndef BOOST_PREPROCESSOR_ARITHMETIC_SUB_HPP
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15 # define BOOST_PREPROCESSOR_ARITHMETIC_SUB_HPP
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17 # include <boost/preprocessor/arithmetic/dec.hpp>
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18 # include <boost/preprocessor/config/config.hpp>
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19 # include <boost/preprocessor/control/while.hpp>
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20 # include <boost/preprocessor/tuple/elem.hpp>
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22 # /* BOOST_PP_SUB */
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24 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
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25 # 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)))
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27 # define BOOST_PP_SUB(x, y) BOOST_PP_SUB_I(x, y)
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28 # 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)))
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31 # define BOOST_PP_SUB_P(d, xy) BOOST_PP_TUPLE_ELEM(2, 1, xy)
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33 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()
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34 # define BOOST_PP_SUB_O(d, xy) BOOST_PP_SUB_O_I xy
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36 # 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))
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39 # define BOOST_PP_SUB_O_I(x, y) (BOOST_PP_DEC(x), BOOST_PP_DEC(y))
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41 # /* BOOST_PP_SUB_D */
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43 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
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44 # 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)))
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46 # define BOOST_PP_SUB_D(d, x, y) BOOST_PP_SUB_D_I(d, x, y)
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47 # 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)))
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