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

   1 #ifndef BOOST_METAPARSE_V1_LAST_OF_HPP
   2 #define BOOST_METAPARSE_V1_LAST_OF_HPP
   3
   4 // Copyright Abel Sinkovics (abel@sinkovics.hu)  2009 - 2010.
   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/nth_of.hpp>
  10
  11 #include <boost/preprocessor/cat.hpp>
  12 #include <boost/preprocessor/punctuation/comma_if.hpp>
  13 #include <boost/preprocessor/repetition/enum_params.hpp>
  14 #include <boost/preprocessor/repetition/enum_params_with_a_default.hpp>
  15 #include <boost/preprocessor/repetition/enum.hpp>
  16 #include <boost/preprocessor/repetition/repeat.hpp>
  17 #include <boost/preprocessor/arithmetic/sub.hpp>
  18 #include <boost/preprocessor/tuple/eat.hpp>
  19
  20 namespace boost
  21 {
  22   namespace metaparse
  23   {
  24     namespace v1
  25     {
  26       template <
  27         BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(
  28           BOOST_METAPARSE_LIMIT_SEQUENCE_SIZE,
  29           class P,
  30           boost::mpl::na
  31         )
  32       >
  33       struct last_of;
  34
  35       #ifdef BOOST_METAPARSE_LAST_OF_N
  36       #  error BOOST_METAPARSE_LAST_OF_N already defined
  37       #endif
  38       #define BOOST_METAPARSE_LAST_OF_N(z, n, unused) \
  39         template <BOOST_PP_ENUM_PARAMS(n, class P)> \
  40         struct last_of< \
  41           BOOST_PP_ENUM_PARAMS(n, P) \
  42           BOOST_PP_COMMA_IF(n) \
  43           BOOST_PP_ENUM( \
  44             BOOST_PP_SUB(BOOST_METAPARSE_LIMIT_SEQUENCE_SIZE, n), \
  45             boost::mpl::na BOOST_PP_TUPLE_EAT(3), \
  46             ~ \
  47           ) \
  48         > : \
  49           impl::BOOST_PP_CAT(nth_of_c, n)< \
  50             n - 1 BOOST_PP_COMMA_IF(n) BOOST_PP_ENUM_PARAMS(n, P) \
  51           > \
  52         {};
  53
  54       BOOST_PP_REPEAT(
  55         BOOST_METAPARSE_LIMIT_SEQUENCE_SIZE,
  56         BOOST_METAPARSE_LAST_OF_N,
  57         ~
  58       )
  59
  60       #undef BOOST_METAPARSE_LAST_OF_N
  61     }
  62   }
  63 }
  64
  65 #endif
  66