boost/preprocessor/seq/replace.hpp

   1 # /* **************************************************************************
   2 #  *                                                                          *
   3 #  *     (C) Copyright Paul Mensonides 2002.
   4 #  *     Distributed under the Boost Software License, Version 1.0. (See
   5 #  *     accompanying file LICENSE_1_0.txt or copy at
   6 #  *     http://www.boost.org/LICENSE_1_0.txt)
   7 #  *                                                                          *
   8 #  ************************************************************************** */
   9 #
  10 # /* See http://www.boost.org for most recent version. */
  11 #
  12 # ifndef BOOST_PREPROCESSOR_SEQ_REPLACE_HPP
  13 # define BOOST_PREPROCESSOR_SEQ_REPLACE_HPP
  14 #
  15 # include <boost/preprocessor/arithmetic/dec.hpp>
  16 # include <boost/preprocessor/arithmetic/inc.hpp>
  17 # include <boost/preprocessor/config/config.hpp>
  18 # include <boost/preprocessor/comparison/equal.hpp>
  19 # include <boost/preprocessor/control/iif.hpp>
  20 # include <boost/preprocessor/seq/first_n.hpp>
  21 # include <boost/preprocessor/seq/rest_n.hpp>
  22 # include <boost/preprocessor/seq/size.hpp>
  23 #
  24 # /* BOOST_PP_SEQ_REPLACE */
  25 #
  26 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
  27 #    define BOOST_PP_SEQ_REPLACE(seq, i, elem) BOOST_PP_SEQ_FIRST_N(i, seq) (elem) BOOST_PP_SEQ_REPLACE_DETAIL_REST(seq, i)
  28 # else
  29 #    define BOOST_PP_SEQ_REPLACE(seq, i, elem) BOOST_PP_SEQ_REPLACE_I(seq, i, elem)
  30 #    define BOOST_PP_SEQ_REPLACE_I(seq, i, elem) BOOST_PP_SEQ_FIRST_N(i, seq) (elem) BOOST_PP_SEQ_REPLACE_DETAIL_REST(seq, i)
  31 # endif
  32 #
  33 #    define BOOST_PP_SEQ_REPLACE_DETAIL_REST_EMPTY(seq, i)
  34 #    define BOOST_PP_SEQ_REPLACE_DETAIL_REST_VALID(seq, i) BOOST_PP_SEQ_REST_N(BOOST_PP_INC(i), seq)
  35 #    define BOOST_PP_SEQ_REPLACE_DETAIL_REST(seq, i) \
  36         BOOST_PP_IIF \
  37             ( \
  38             BOOST_PP_EQUAL(i,BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq))), \
  39             BOOST_PP_SEQ_REPLACE_DETAIL_REST_EMPTY, \
  40             BOOST_PP_SEQ_REPLACE_DETAIL_REST_VALID \
  41             ) \
  42         (seq, i) \
  43 /**/
  44 #
  45 # endif