williamr@2: # /* **************************************************************************
williamr@2: #  *                                                                          *
williamr@2: #  *     (C) Copyright Paul Mensonides 2002.
williamr@2: #  *     Distributed under the Boost Software License, Version 1.0. (See
williamr@2: #  *     accompanying file LICENSE_1_0.txt or copy at
williamr@2: #  *     http://www.boost.org/LICENSE_1_0.txt)
williamr@2: #  *                                                                          *
williamr@2: #  ************************************************************************** */
williamr@2: #
williamr@2: # /* See http://www.boost.org for most recent version. */
williamr@2: #
williamr@2: # ifndef BOOST_PREPROCESSOR_SEQ_FIRST_N_HPP
williamr@2: # define BOOST_PREPROCESSOR_SEQ_FIRST_N_HPP
williamr@2: #
williamr@2: # include <boost/preprocessor/config/config.hpp>
williamr@2: # include <boost/preprocessor/control/if.hpp>
williamr@2: # include <boost/preprocessor/seq/detail/split.hpp>
williamr@2: # include <boost/preprocessor/tuple/eat.hpp>
williamr@2: # include <boost/preprocessor/tuple/elem.hpp>
williamr@2: #
williamr@2: # /* BOOST_PP_SEQ_FIRST_N */
williamr@2: #
williamr@2: # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
williamr@2: #    define BOOST_PP_SEQ_FIRST_N(n, seq) BOOST_PP_IF(n, BOOST_PP_TUPLE_ELEM, BOOST_PP_TUPLE_EAT_3)(2, 0, BOOST_PP_SEQ_SPLIT(n, seq (nil)))
williamr@2: # else
williamr@2: #    define BOOST_PP_SEQ_FIRST_N(n, seq) BOOST_PP_SEQ_FIRST_N_I(n, seq)
williamr@2: #    define BOOST_PP_SEQ_FIRST_N_I(n, seq) BOOST_PP_IF(n, BOOST_PP_TUPLE_ELEM, BOOST_PP_TUPLE_EAT_3)(2, 0, BOOST_PP_SEQ_SPLIT(n, seq (nil)))
williamr@2: # endif
williamr@2: #
williamr@2: # endif