preprocessor/list/rest_n.hpp

0001 # /* Copyright (C) 2001
0002 #  * Housemarque Oy
0003 #  * http://www.housemarque.com
0004 #  *
0005 #  * Distributed under the Boost Software License, Version 1.0. (See
0006 #  * accompanying file LICENSE_1_0.txt or copy at
0007 #  * http://www.boost.org/LICENSE_1_0.txt)
0008 #  */
0009 #
0010 # /* Revised by Paul Mensonides (2002) */
0011 #
0012 # /* See http://www.boost.org for most recent version. */
0013 #
0014 # ifndef BOOST_PREPROCESSOR_LIST_REST_N_HPP
0015 # define BOOST_PREPROCESSOR_LIST_REST_N_HPP
0016 #
0017 # include <boost/preprocessor/arithmetic/dec.hpp>
0018 # include <boost/preprocessor/config/config.hpp>
0019 # include <boost/preprocessor/control/while.hpp>
0020 # include <boost/preprocessor/list/adt.hpp>
0021 # include <boost/preprocessor/tuple/elem.hpp>
0022 #
0023 # /* BOOST_PP_LIST_REST_N */
0024 #
0025 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
0026 #    define BOOST_PP_LIST_REST_N(count, list) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE(BOOST_PP_LIST_REST_N_P, BOOST_PP_LIST_REST_N_O, (list, count)))
0027 # else
0028 #    define BOOST_PP_LIST_REST_N(count, list) BOOST_PP_LIST_REST_N_I(count, list)
0029 #    define BOOST_PP_LIST_REST_N_I(count, list) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE(BOOST_PP_LIST_REST_N_P, BOOST_PP_LIST_REST_N_O, (list, count)))
0030 # endif
0031 #
0032 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
0033 #    define BOOST_PP_LIST_REST_N_P(d, lc) BOOST_PP_TUPLE_ELEM(2, 1, lc)
0034 # else
0035 #    define BOOST_PP_LIST_REST_N_P(d, lc) BOOST_PP_LIST_REST_N_P_I lc
0036 #    define BOOST_PP_LIST_REST_N_P_I(list, count) count
0037 # endif
0038 #
0039 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
0040 #    define BOOST_PP_LIST_REST_N_O(d, lc) (BOOST_PP_LIST_REST(BOOST_PP_TUPLE_ELEM(2, 0, lc)), BOOST_PP_DEC(BOOST_PP_TUPLE_ELEM(2, 1, lc)))
0041 # else
0042 #    define BOOST_PP_LIST_REST_N_O(d, lc) BOOST_PP_LIST_REST_N_O_I lc
0043 #    define BOOST_PP_LIST_REST_N_O_I(list, count) (BOOST_PP_LIST_REST(list), BOOST_PP_DEC(count))
0044 # endif
0045 #
0046 # /* BOOST_PP_LIST_REST_N_D */
0047 #
0048 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
0049 #    define BOOST_PP_LIST_REST_N_D(d, count, list) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE_ ## d(BOOST_PP_LIST_REST_N_P, BOOST_PP_LIST_REST_N_O, (list, count)))
0050 # else
0051 #    define BOOST_PP_LIST_REST_N_D(d, count, list) BOOST_PP_LIST_REST_N_D_I(d, count, list)
0052 #    define BOOST_PP_LIST_REST_N_D_I(d, count, list) BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_WHILE_ ## d(BOOST_PP_LIST_REST_N_P, BOOST_PP_LIST_REST_N_O, (list, count)))
0053 # endif
0054 #
0055 # endif