3rdparty/boost/boost/parameter/aux_/preprocessor/binary_seq_to_args.hpp

   1 // Copyright Cromwell D. Enage 2017.
   2 // Distributed under the Boost Software License, Version 1.0.
   3 // (See accompanying file LICENSE_1_0.txt or copy at
   4 // http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef BOOST_PARAMETER_AUX_PREPROCESSOR_BINARY_SEQ_TO_ARGS_HPP
   7 #define BOOST_PARAMETER_AUX_PREPROCESSOR_BINARY_SEQ_TO_ARGS_HPP
   8
   9 #include <boost/preprocessor/seq/elem.hpp>
  10 #include <boost/preprocessor/cat.hpp>
  11
  12 #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0_1(n, prefix_seq)          \
  13     BOOST_PP_CAT(BOOST_PP_SEQ_ELEM(0, prefix_seq), n) const&
  14 /**/
  15
  16 #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1_1(n, prefix_seq)          \
  17     BOOST_PP_CAT(BOOST_PP_SEQ_ELEM(0, prefix_seq), n)&
  18 /**/
  19
  20 #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0_2(n, prefix_seq)          \
  21     BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0_1(n, prefix_seq)              \
  22     BOOST_PP_CAT(BOOST_PP_SEQ_ELEM(1, prefix_seq), n)
  23 /**/
  24
  25 #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1_2(n, prefix_seq)          \
  26     BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1_1(n, prefix_seq)              \
  27     BOOST_PP_CAT(BOOST_PP_SEQ_ELEM(1, prefix_seq), n)
  28 /**/
  29
  30 #include <boost/preprocessor/seq/size.hpp>
  31
  32 #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0(prefix_seq)               \
  33     BOOST_PP_CAT(                                                            \
  34         BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0_                          \
  35       , BOOST_PP_SEQ_SIZE(prefix_seq)                                        \
  36     )
  37 /**/
  38
  39 #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1(prefix_seq)               \
  40     BOOST_PP_CAT(                                                            \
  41         BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1_                          \
  42       , BOOST_PP_SEQ_SIZE(prefix_seq)                                        \
  43     )
  44 /**/
  45
  46 #include <boost/parameter/aux_/preprocessor/convert_binary_seq.hpp>
  47
  48 // This macro converts the specified Boost.Preprocessor sequence of 1s and 0s
  49 // into a formal function parameter list.
  50 //
  51 // Example:
  52 // BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARGS((1)(0)(1)(0), (P)(p))
  53 // expands to
  54 // P0 & p0, P1 const& p1, P2 & p2, P3 const& p3
  55 #define BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARGS(binary_seq, prefix_seq)    \
  56     BOOST_PARAMETER_AUX_PP_CONVERT_BINARY_SEQ(                               \
  57         binary_seq                                                           \
  58       , BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_0(prefix_seq)               \
  59       , BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARG_1(prefix_seq)               \
  60       , prefix_seq                                                           \
  61     )
  62 /**/
  63
  64 #endif  // include guard
  65