ceph/src/boost/libs/metaparse/include/boost/metaparse/v1/nth_of_c.hpp

   1 #ifndef BOOST_METAPARSE_V1_NTH_OF_C_HPP
   2 #define BOOST_METAPARSE_V1_NTH_OF_C_HPP
   3
   4 // Copyright Abel Sinkovics (abel@sinkovics.hu)  2013.
   5 // Distributed under the Boost Software License, Version 1.0.
   6 //    (See accompanying file LICENSE_1_0.txt or copy at
   7 //          http://www.boost.org/LICENSE_1_0.txt)
   8
   9 #include <boost/metaparse/v1/impl/nth_of_c.hpp>
  10 #include <boost/metaparse/limit_sequence_size.hpp>
  11
  12 #include <boost/preprocessor/repetition/repeat.hpp>
  13 #include <boost/preprocessor/repetition/enum.hpp>
  14 #include <boost/preprocessor/punctuation/comma_if.hpp>
  15 #include <boost/preprocessor/repetition/enum_params.hpp>
  16 #include <boost/preprocessor/repetition/enum_params_with_a_default.hpp>
  17 #include <boost/preprocessor/arithmetic/sub.hpp>
  18 #include <boost/preprocessor/cat.hpp>
  19 #include <boost/preprocessor/tuple/eat.hpp>
  20
  21 namespace boost
  22 {
  23   namespace metaparse
  24   {
  25     namespace v1
  26     {
  27       template <
  28         int N,
  29         BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(
  30           BOOST_METAPARSE_LIMIT_SEQUENCE_SIZE,
  31           class P,
  32           boost::mpl::na
  33         )
  34       >
  35       struct nth_of_c;
  36
  37       #ifdef BOOST_METAPARSE_NTH_OF_N
  38       #  error BOOST_METAPARSE_NTH_OF_N already defined
  39       #endif
  40       #define BOOST_METAPARSE_NTH_OF_N(z, n, unused) \
  41         template <int K BOOST_PP_COMMA_IF(n) BOOST_PP_ENUM_PARAMS(n, class P)> \
  42         struct nth_of_c< \
  43           K, \
  44           BOOST_PP_ENUM_PARAMS(n, P) \
  45           BOOST_PP_COMMA_IF(n) \
  46           BOOST_PP_ENUM( \
  47             BOOST_PP_SUB(BOOST_METAPARSE_LIMIT_SEQUENCE_SIZE, n), \
  48             boost::mpl::na BOOST_PP_TUPLE_EAT(3), \
  49             ~ \
  50           ) \
  51         > : \
  52           impl::BOOST_PP_CAT(nth_of_c, n)< \
  53             K BOOST_PP_COMMA_IF(n) \
  54             BOOST_PP_ENUM_PARAMS(n, P) \
  55           > \
  56         {};
  57
  58       BOOST_PP_REPEAT(
  59         BOOST_METAPARSE_LIMIT_SEQUENCE_SIZE,
  60         BOOST_METAPARSE_NTH_OF_N,
  61         ~
  62       )
  63
  64       #undef BOOST_METAPARSE_NTH_OF_N
  65     }
  66   }
  67 }
  68
  69 #endif
  70