1 # /* Copyright (C) 2001 2 # * Housemarque Oy 3 # * http://www.housemarque.com 4 # * 5 # * Distributed under the Boost Software License, Version 1.0. (See 6 # * accompanying file LICENSE_1_0.txt or copy at 7 # * http://www.boost.org/LICENSE_1_0.txt) 8 # */ 9 # 10 # /* Revised by Paul Mensonides (2002) */ 11 # 12 # /* See http://www.boost.org for most recent version. */ 13 # 14 # ifndef BOOST_PREPROCESSOR_LIST_AT_HPP 15 # define BOOST_PREPROCESSOR_LIST_AT_HPP 16 # 17 # include <boost/preprocessor/config/config.hpp> 18 # include <boost/preprocessor/list/adt.hpp> 19 # include <boost/preprocessor/list/rest_n.hpp> 20 # 21 # /* BOOST_PP_LIST_AT */ 22 # 23 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() 24 # define BOOST_PP_LIST_AT(list, index) BOOST_PP_LIST_FIRST(BOOST_PP_LIST_REST_N(index, list)) 25 # else 26 # define BOOST_PP_LIST_AT(list, index) BOOST_PP_LIST_AT_I(list, index) 27 # define BOOST_PP_LIST_AT_I(list, index) BOOST_PP_LIST_FIRST(BOOST_PP_LIST_REST_N(index, list)) 28 # endif 29 # 30 # /* BOOST_PP_LIST_AT_D */ 31 # 32 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() 33 # define BOOST_PP_LIST_AT_D(d, list, index) BOOST_PP_LIST_FIRST(BOOST_PP_LIST_REST_N_D(d, index, list)) 34 # else 35 # define BOOST_PP_LIST_AT_D(d, list, index) BOOST_PP_LIST_AT_D_I(d, list, index) 36 # define BOOST_PP_LIST_AT_D_I(d, list, index) BOOST_PP_LIST_FIRST(BOOST_PP_LIST_REST_N_D(d, index, list)) 37 # endif 38 # 39 # endif 40