ceph/src/boost/boost/range/detail/combine_no_rvalue.hpp

   1 // Boost.Range library
   2 //
   3 //  Copyright Neil Groves 2014. Use, modification and
   4 //  distribution is subject to the Boost Software License, Version
   5 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
   6 //  http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8 // For more information, see http://www.boost.org/libs/range/
   9 //
  10 #define BOOST_RANGE_combined_exp_pred(d, data) BOOST_PP_TUPLE_ELEM(3, 0, data)
  11
  12 #define BOOST_RANGE_combined_exp_op(d, data) \
  13  ( \
  14     BOOST_PP_DEC( \
  15        BOOST_PP_TUPLE_ELEM(3, 0, data) \
  16     ), \
  17     BOOST_PP_TUPLE_ELEM(3, 1, data), \
  18     BOOST_PP_MUL_D( \
  19        d, \
  20        BOOST_PP_TUPLE_ELEM(3, 2, data), \
  21        BOOST_PP_TUPLE_ELEM(3, 1, data) \
  22     ) \
  23  )
  24
  25 #define BOOST_RANGE_combined_exp(x, n) \
  26   BOOST_PP_TUPLE_ELEM(3, 2, \
  27   BOOST_PP_WHILE(BOOST_RANGE_combined_exp_pred, \
  28                  BOOST_RANGE_combined_exp_op, (n, x, 1)))
  29
  30 #define BOOST_RANGE_combined_bitset_pred(n, state) \
  31     BOOST_PP_TUPLE_ELEM(2,1,state)
  32
  33 #define BOOST_RANGE_combined_bitset_op(d, state) \
  34     (BOOST_PP_DIV_D(d, BOOST_PP_TUPLE_ELEM(2,0,state), 2), \
  35      BOOST_PP_DEC(BOOST_PP_TUPLE_ELEM(2,1,state)))
  36
  37 #define BOOST_RANGE_combined_bitset(i, n) \
  38 BOOST_PP_MOD(BOOST_PP_TUPLE_ELEM(2, 0, \
  39       BOOST_PP_WHILE(BOOST_RANGE_combined_bitset_pred, \
  40                      BOOST_RANGE_combined_bitset_op, (i,n))), 2)
  41
  42 #define BOOST_RANGE_combined_range_iterator(z, n, i) \
  43   typename range_iterator< \
  44       BOOST_PP_CAT(R,n)          \
  45       BOOST_PP_IF( \
  46           BOOST_RANGE_combined_bitset(i,n), \
  47           BOOST_PP_IDENTITY(const), \
  48           BOOST_PP_EMPTY)() \
  49   >::type
  50
  51 #define BOOST_RANGE_combined_args(z, n, i) \
  52   BOOST_PP_CAT(R, n) \
  53   BOOST_PP_IF(BOOST_RANGE_combined_bitset(i,n), const&, &)  \
  54   BOOST_PP_CAT(r, n)
  55
  56 #define BOOST_RANGE_combine_impl(z, i, n)\
  57     template<BOOST_PP_ENUM_PARAMS(n, typename R)> \
  58     inline range::combined_range< \
  59         boost::tuple<BOOST_PP_ENUM(n, BOOST_RANGE_combined_range_iterator, i)> \
  60     > \
  61     combine(BOOST_PP_ENUM(n, BOOST_RANGE_combined_args, i)) \
  62     { \
  63         typedef tuple< \
  64             BOOST_PP_ENUM(n, BOOST_RANGE_combined_range_iterator, i) \
  65         > rng_tuple_t;   \
  66         return range::combined_range<rng_tuple_t>( \
  67             rng_tuple_t(BOOST_PP_ENUM(n, BOOST_RANGE_combined_seq, begin)), \
  68             rng_tuple_t(BOOST_PP_ENUM(n, BOOST_RANGE_combined_seq, end))); \
  69     }
  70
  71
  72 #define BOOST_RANGE_combine(z, n, data) \
  73   BOOST_PP_REPEAT(BOOST_RANGE_combined_exp(2,n), BOOST_RANGE_combine_impl, n)