boost/fusion/container/deque/detail/as_deque.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2006 Joel de Guzman
   3     Copyright (c) 2006 Dan Marsden
   4
   5     Distributed under the Boost Software License, Version 1.0. (See accompanying
   6     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7 ==============================================================================*/
   8 #ifndef BOOST_PP_IS_ITERATING
   9 #if !defined(FUSION_AS_DEQUE_20061213_2210)
  10 #define FUSION_AS_DEQUE_20061213_2210
  11
  12 #include <boost/preprocessor/iterate.hpp>
  13 #include <boost/preprocessor/repetition/enum_params.hpp>
  14 #include <boost/preprocessor/repetition/enum_binary_params.hpp>
  15 #include <boost/preprocessor/repetition/repeat.hpp>
  16 #include <boost/preprocessor/cat.hpp>
  17 #include <boost/preprocessor/inc.hpp>
  18 #include <boost/preprocessor/dec.hpp>
  19 #include <boost/fusion/container/deque/deque.hpp>
  20 #include <boost/fusion/iterator/value_of.hpp>
  21 #include <boost/fusion/iterator/deref.hpp>
  22 #include <boost/fusion/iterator/next.hpp>
  23
  24 namespace boost { namespace fusion { namespace detail
  25 {
  26     template <int size>
  27     struct as_deque;
  28
  29     template <>
  30     struct as_deque<0>
  31     {
  32         template <typename Iterator>
  33         struct apply
  34         {
  35             typedef deque<> type;
  36         };
  37
  38         template <typename Iterator>
  39         static typename apply<Iterator>::type
  40         call(Iterator)
  41         {
  42             return deque<>();
  43         }
  44     };
  45
  46 #define BOOST_FUSION_NEXT_ITERATOR(z, n, data)                                  \
  47     typedef typename fusion::result_of::next<BOOST_PP_CAT(I, n)>::type          \
  48         BOOST_PP_CAT(I, BOOST_PP_INC(n));
  49
  50 #define BOOST_FUSION_NEXT_CALL_ITERATOR(z, n, data)                             \
  51     typename gen::BOOST_PP_CAT(I, BOOST_PP_INC(n))                              \
  52         BOOST_PP_CAT(i, BOOST_PP_INC(n)) = fusion::next(BOOST_PP_CAT(i, n));
  53
  54 #define BOOST_FUSION_VALUE_OF_ITERATOR(z, n, data)                              \
  55     typedef typename fusion::result_of::value_of<BOOST_PP_CAT(I, n)>::type      \
  56         BOOST_PP_CAT(T, n);
  57
  58 #define BOOST_PP_FILENAME_1 <boost/fusion/container/deque/detail/as_deque.hpp>
  59 #define BOOST_PP_ITERATION_LIMITS (1, FUSION_MAX_DEQUE_SIZE)
  60 #include BOOST_PP_ITERATE()
  61
  62 #undef BOOST_FUSION_NEXT_ITERATOR
  63 #undef BOOST_FUSION_NEXT_CALL_ITERATOR
  64 #undef BOOST_FUSION_VALUE_OF_ITERATOR
  65
  66 }}}
  67
  68 #endif
  69 #else // defined(BOOST_PP_IS_ITERATING)
  70 ///////////////////////////////////////////////////////////////////////////////
  71 //
  72 //  Preprocessor vertical repetition code
  73 //
  74 ///////////////////////////////////////////////////////////////////////////////
  75
  76 #define N BOOST_PP_ITERATION()
  77
  78     template <>
  79     struct as_deque<N>
  80     {
  81         template <typename I0>
  82         struct apply
  83         {
  84             BOOST_PP_REPEAT(N, BOOST_FUSION_NEXT_ITERATOR, _)
  85             BOOST_PP_REPEAT(N, BOOST_FUSION_VALUE_OF_ITERATOR, _)
  86             typedef deque<BOOST_PP_ENUM_PARAMS(N, T)> type;
  87         };
  88
  89         template <typename Iterator>
  90         static typename apply<Iterator>::type
  91         call(Iterator const& i0)
  92         {
  93             typedef apply<Iterator> gen;
  94             typedef typename gen::type result;
  95             BOOST_PP_REPEAT(BOOST_PP_DEC(N), BOOST_FUSION_NEXT_CALL_ITERATOR, _)
  96             return result(BOOST_PP_ENUM_PARAMS(N, *i));
  97         }
  98     };
  99
 100 #undef N
 101 #endif // defined(BOOST_PP_IS_ITERATING)
 102