2010-07-26 17:06:36 +00:00
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# /* Copyright (C) 2001
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# * Housemarque Oy
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# * http://www.housemarque.com
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# *
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# * Distributed under the Boost Software License, Version 1.0. (See
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# * accompanying file LICENSE_1_0.txt or copy at
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# * http://www.boost.org/LICENSE_1_0.txt)
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# */
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#
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# /* Revised by Paul Mensonides (2002) */
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#
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# /* See http://www.boost.org for most recent version. */
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#
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# ifndef BOOST_PREPROCESSOR_ARITHMETIC_SUB_HPP
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# define BOOST_PREPROCESSOR_ARITHMETIC_SUB_HPP
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#
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# include <boost/preprocessor/arithmetic/dec.hpp>
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# include <boost/preprocessor/config/config.hpp>
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# include <boost/preprocessor/control/while.hpp>
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# include <boost/preprocessor/tuple/elem.hpp>
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#
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# /* BOOST_PP_SUB */
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#
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# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
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# 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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# else
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# define BOOST_PP_SUB(x, y) BOOST_PP_SUB_I(x, y)
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# 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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# endif
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#
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# define BOOST_PP_SUB_P(d, xy) BOOST_PP_TUPLE_ELEM(2, 1, xy)
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#
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# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()
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# define BOOST_PP_SUB_O(d, xy) BOOST_PP_SUB_O_I xy
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# else
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# 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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# endif
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#
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# define BOOST_PP_SUB_O_I(x, y) (BOOST_PP_DEC(x), BOOST_PP_DEC(y))
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#
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# /* BOOST_PP_SUB_D */
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#
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# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
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# 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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# else
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# define BOOST_PP_SUB_D(d, x, y) BOOST_PP_SUB_D_I(d, x, y)
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# 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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# endif
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#
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# endif
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