preprocessor/facilities/identity.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 # /* Revised by Edward Diener (2015) */
0012 #
0013 # /* See http://www.boost.org for most recent version. */
0014 #
0015 # ifndef BOOST_PREPROCESSOR_FACILITIES_IDENTITY_HPP
0016 # define BOOST_PREPROCESSOR_FACILITIES_IDENTITY_HPP
0017 #
0018 # include <boost/preprocessor/facilities/empty.hpp>
0019 # include <boost/preprocessor/tuple/eat.hpp>
0020 #
0021 # /* BOOST_PP_IDENTITY */
0022 #
0023 # define BOOST_PP_IDENTITY(item) item BOOST_PP_EMPTY
0024 #
0025 # define BOOST_PP_IDENTITY_N(item,n) item BOOST_PP_TUPLE_EAT_N(n)
0026 #
0027 # endif