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_CAT_HPP
15# define BOOST_PREPROCESSOR_LIST_CAT_HPP
16#
17# include <boost/preprocessor/cat.hpp>
18# include <boost/preprocessor/config/config.hpp>
19# include <boost/preprocessor/list/adt.hpp>
20# include <boost/preprocessor/list/fold_left.hpp>
21#
22# /* BOOST_PP_LIST_CAT */
23#
24# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
25# 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))
26# else
27# define BOOST_PP_LIST_CAT(list) BOOST_PP_LIST_CAT_I(list)
28# 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))
29# endif
30#
31# define BOOST_PP_LIST_CAT_O(d, s, x) BOOST_PP_CAT(s, x)
32#
33# /* BOOST_PP_LIST_CAT_D */
34#
35# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
36# 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))
37# else
38# define BOOST_PP_LIST_CAT_D(d, list) BOOST_PP_LIST_CAT_D_I(d, list)
39# 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))
40# endif
41#
42# endif
43

source code of boost/boost/preprocessor/list/cat.hpp