ceph/src/boost/boost/metaparse/v1/cpp98/impl/nth_of_c.hpp

   1 #ifndef BOOST_METAPARSE_V1_CPP98_IMPL_NTH_OF_C_HPP
   2 #define BOOST_METAPARSE_V1_CPP98_IMPL_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/cpp98/impl/nth_of_c_impl.hpp>
  10 #include <boost/metaparse/v1/error/index_out_of_range.hpp>
  11 #include <boost/metaparse/v1/fail.hpp>
  12 #include <boost/metaparse/limit_sequence_size.hpp>
  13
  14 #include <boost/mpl/list.hpp>
  15
  16 #include <boost/preprocessor/repetition/repeat.hpp>
  17 #include <boost/preprocessor/punctuation/comma_if.hpp>
  18 #include <boost/preprocessor/repetition/enum_params.hpp>
  19 #include <boost/preprocessor/cat.hpp>
  20
  21 namespace boost
  22 {
  23   namespace metaparse
  24   {
  25     namespace v1
  26     {
  27       namespace impl
  28       {
  29         #ifdef BOOST_METAPARSE_NTH_OF_CASE
  30         #  error BOOST_METAPARSE_NTH_OF_CASE already defined
  31         #endif
  32         #define BOOST_METAPARSE_NTH_OF_CASE(z, n, unused) \
  33           template < \
  34             int K BOOST_PP_COMMA_IF(n) \
  35             BOOST_PP_ENUM_PARAMS(n, class P) \
  36           > \
  37           struct BOOST_PP_CAT(nth_of_c, n) : \
  38             boost::mpl::if_< \
  39               boost::mpl::bool_<(0 <= K && K < n)>, \
  40               nth_of_c_impl< \
  41                 K, \
  42                 boost::mpl::list<BOOST_PP_ENUM_PARAMS(n, P)> \
  43               >, \
  44               fail<error::index_out_of_range<0, n - 1, K> > \
  45             >::type \
  46           {};
  47
  48         BOOST_PP_REPEAT(
  49           BOOST_METAPARSE_LIMIT_SEQUENCE_SIZE,
  50           BOOST_METAPARSE_NTH_OF_CASE,
  51           ~
  52         )
  53
  54         #undef BOOST_METAPARSE_NTH_OF_CASE
  55       }
  56     }
  57   }
  58 }
  59
  60 #endif
  61