boost/preprocessor/list/to_tuple.hpp

   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_TO_TUPLE_HPP
  15 # define BOOST_PREPROCESSOR_LIST_TO_TUPLE_HPP
  16 #
  17 # include <boost/preprocessor/config/config.hpp>
  18 # include <boost/preprocessor/list/enum.hpp>
  19 # include <boost/preprocessor/control/iif.hpp>
  20 #
  21 # /* BOOST_PP_LIST_TO_TUPLE */
  22 #
  23 # define BOOST_PP_LIST_TO_TUPLE(list) \
  24     BOOST_PP_IIF \
  25         ( \
  26         BOOST_PP_LIST_IS_NIL(list), \
  27         BOOST_PP_LIST_TO_TUPLE_EMPTY, \
  28         BOOST_PP_LIST_TO_TUPLE_DO \
  29         ) \
  30     (list) \
  31 /**/
  32 # define BOOST_PP_LIST_TO_TUPLE_EMPTY(list)
  33 #
  34 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
  35 #    define BOOST_PP_LIST_TO_TUPLE_DO(list) (BOOST_PP_LIST_ENUM(list))
  36 # else
  37 #    define BOOST_PP_LIST_TO_TUPLE_DO(list) BOOST_PP_LIST_TO_TUPLE_I(list)
  38 #    define BOOST_PP_LIST_TO_TUPLE_I(list) (BOOST_PP_LIST_ENUM(list))
  39 # endif
  40 #
  41 # /* BOOST_PP_LIST_TO_TUPLE_R */
  42 #
  43 # define BOOST_PP_LIST_TO_TUPLE_R(r, list) \
  44     BOOST_PP_IIF \
  45         ( \
  46         BOOST_PP_LIST_IS_NIL(list), \
  47         BOOST_PP_LIST_TO_TUPLE_R_EMPTY, \
  48         BOOST_PP_LIST_TO_TUPLE_R_DO \
  49         ) \
  50     (r, list) \
  51 /**/
  52 # define BOOST_PP_LIST_TO_TUPLE_R_EMPTY(r,list)
  53 #
  54 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
  55 #    define BOOST_PP_LIST_TO_TUPLE_R_DO(r, list) (BOOST_PP_LIST_ENUM_R(r, list))
  56 # else
  57 #    define BOOST_PP_LIST_TO_TUPLE_R_DO(r, list) BOOST_PP_LIST_TO_TUPLE_R_I(r, list)
  58 #    define BOOST_PP_LIST_TO_TUPLE_R_I(r, list) (BOOST_PP_LIST_ENUM_R(r, list))
  59 # endif
  60 #
  61 # endif