# /* 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_LIST_FIRST_N_HPP | |
# define BOOST_PREPROCESSOR_LIST_FIRST_N_HPP | |
# | |
# include <boost/preprocessor/arithmetic/dec.hpp> | |
# include <boost/preprocessor/config/config.hpp> | |
# include <boost/preprocessor/control/while.hpp> | |
# include <boost/preprocessor/list/adt.hpp> | |
# include <boost/preprocessor/list/reverse.hpp> | |
# include <boost/preprocessor/tuple/elem.hpp> | |
# include <boost/preprocessor/tuple/rem.hpp> | |
# | |
# /* BOOST_PP_LIST_FIRST_N */ | |
# | |
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() | |
# define BOOST_PP_LIST_FIRST_N(count, list) BOOST_PP_LIST_REVERSE(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_WHILE(BOOST_PP_LIST_FIRST_N_P, BOOST_PP_LIST_FIRST_N_O, (count, list, BOOST_PP_NIL)))) | |
# else | |
# define BOOST_PP_LIST_FIRST_N(count, list) BOOST_PP_LIST_FIRST_N_I(count, list) | |
# define BOOST_PP_LIST_FIRST_N_I(count, list) BOOST_PP_LIST_REVERSE(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_WHILE(BOOST_PP_LIST_FIRST_N_P, BOOST_PP_LIST_FIRST_N_O, (count, list, BOOST_PP_NIL)))) | |
# endif | |
# | |
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() | |
# define BOOST_PP_LIST_FIRST_N_P(d, data) BOOST_PP_TUPLE_ELEM(3, 0, data) | |
# else | |
# define BOOST_PP_LIST_FIRST_N_P(d, data) BOOST_PP_LIST_FIRST_N_P_I data | |
# define BOOST_PP_LIST_FIRST_N_P_I(c, l, nl) c | |
# endif | |
# | |
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC() | |
# define BOOST_PP_LIST_FIRST_N_O(d, data) BOOST_PP_LIST_FIRST_N_O_D data | |
# else | |
# define BOOST_PP_LIST_FIRST_N_O(d, data) BOOST_PP_LIST_FIRST_N_O_D(BOOST_PP_TUPLE_ELEM(3, 0, data), BOOST_PP_TUPLE_ELEM(3, 1, data), BOOST_PP_TUPLE_ELEM(3, 2, data)) | |
# endif | |
# | |
# define BOOST_PP_LIST_FIRST_N_O_D(c, l, nl) (BOOST_PP_DEC(c), BOOST_PP_LIST_REST(l), (BOOST_PP_LIST_FIRST(l), nl)) | |
# | |
# /* BOOST_PP_LIST_FIRST_N_D */ | |
# | |
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() | |
# define BOOST_PP_LIST_FIRST_N_D(d, count, list) BOOST_PP_LIST_REVERSE_D(d, BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_WHILE_ ## d(BOOST_PP_LIST_FIRST_N_P, BOOST_PP_LIST_FIRST_N_O, (count, list, BOOST_PP_NIL)))) | |
# else | |
# define BOOST_PP_LIST_FIRST_N_D(d, count, list) BOOST_PP_LIST_FIRST_N_D_I(d, count, list) | |
# define BOOST_PP_LIST_FIRST_N_D_I(d, count, list) BOOST_PP_LIST_REVERSE_D(d, BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_WHILE_ ## d(BOOST_PP_LIST_FIRST_N_P, BOOST_PP_LIST_FIRST_N_O, (count, list, BOOST_PP_NIL)))) | |
# endif | |
# | |
# endif |