preprocessor/list/cat.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_CAT_HPP
0015 # define BOOST_PREPROCESSOR_LIST_CAT_HPP
0016 #
0017 # include <boost/preprocessor/cat.hpp>
0018 # include <boost/preprocessor/config/config.hpp>
0019 # include <boost/preprocessor/list/adt.hpp>
0020 # include <boost/preprocessor/list/fold_left.hpp>
0021 #
0022 # /* BOOST_PP_LIST_CAT */
0023 #
0024 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
0025 #    define BOOST_PP_LIST_CAT(list) BOOST_PP_LIST_FOLD_LEFT(BOOST_PP_LIST_CAT_O, BOOST_PP_LIST_FIRST(list), BOOST_PP_LIST_REST(list))
0026 # else
0027 #    define BOOST_PP_LIST_CAT(list) BOOST_PP_LIST_CAT_I(list)
0028 #    define BOOST_PP_LIST_CAT_I(list) BOOST_PP_LIST_FOLD_LEFT(BOOST_PP_LIST_CAT_O, BOOST_PP_LIST_FIRST(list), BOOST_PP_LIST_REST(list))
0029 # endif
0030 #
0031 # define BOOST_PP_LIST_CAT_O(d, s, x) BOOST_PP_CAT(s, x)
0032 #
0033 # /* BOOST_PP_LIST_CAT_D */
0034 #
0035 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
0036 #    define BOOST_PP_LIST_CAT_D(d, list) BOOST_PP_LIST_FOLD_LEFT_ ## d(BOOST_PP_LIST_CAT_O, BOOST_PP_LIST_FIRST(list), BOOST_PP_LIST_REST(list))
0037 # else
0038 #    define BOOST_PP_LIST_CAT_D(d, list) BOOST_PP_LIST_CAT_D_I(d, list)
0039 #    define BOOST_PP_LIST_CAT_D_I(d, list) BOOST_PP_LIST_FOLD_LEFT_ ## d(BOOST_PP_LIST_CAT_O, BOOST_PP_LIST_FIRST(list), BOOST_PP_LIST_REST(list))
0040 # endif
0041 #
0042 # endif