[857] | 1 | # /* Copyright (C) 2001
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| 2 | # * Housemarque Oy
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| 3 | # * http://www.housemarque.com
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| 4 | # *
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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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| 8 | # */
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| 9 | #
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| 10 | # /* Revised by Paul Mensonides (2002) */
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| 11 | #
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| 12 | # /* See http://www.boost.org for most recent version. */
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| 13 | #
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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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| 16 | #
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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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| 21 | #
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| 22 | # /* BOOST_PP_SUB */
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| 23 | #
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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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| 26 | # else
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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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| 29 | # endif
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| 30 | #
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| 31 | # define BOOST_PP_SUB_P(d, xy) BOOST_PP_TUPLE_ELEM(2, 1, xy)
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| 32 | #
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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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| 35 | # else
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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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| 37 | # endif
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| 38 | #
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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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| 40 | #
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| 41 | # /* BOOST_PP_SUB_D */
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| 42 | #
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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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| 45 | # else
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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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| 48 | # endif
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| 49 | #
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| 50 | # endif
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