ceph/src/boost/libs/metaparse/include/boost/metaparse/v1/impl/update_c.hpp

   1 #ifndef BOOST_METAPARSE_V1_IMPL_UPDATE_C_HPP
   2 #define BOOST_METAPARSE_V1_IMPL_UPDATE_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/config.hpp>
  10 #include <boost/metaparse/v1/fwd/string.hpp>
  11 #include <boost/metaparse/v1/impl/split_at_c.hpp>
  12 #include <boost/metaparse/v1/impl/concat.hpp>
  13
  14 #include <boost/preprocessor/arithmetic/dec.hpp>
  15 #include <boost/preprocessor/arithmetic/inc.hpp>
  16 #include <boost/preprocessor/cat.hpp>
  17 #include <boost/preprocessor/punctuation/comma_if.hpp>
  18 #include <boost/preprocessor/repetition/enum_params.hpp>
  19 #include <boost/preprocessor/repetition/repeat.hpp>
  20 #include <boost/preprocessor/repetition/repeat_from_to.hpp>
  21
  22 namespace boost
  23 {
  24   namespace metaparse
  25   {
  26     namespace v1
  27     {
  28       namespace impl
  29       {
  30 #ifndef BOOST_METAPARSE_VARIADIC_STRING
  31         template <class S, int N, int C>
  32         struct update_c;
  33
  34         #ifdef BOOST_METAPARSE_ARGN
  35         #  error BOOST_METAPARSE_ARGN already defined
  36         #endif
  37         #define BOOST_METAPARSE_ARGN(z, n, unused) , BOOST_PP_CAT(C, n)
  38
  39         #ifdef BOOST_METAPARSE_UPDATE
  40         #  error BOOST_METAPARSE_UPDATE already defined
  41         #endif
  42         #define BOOST_METAPARSE_UPDATE(z, n, unused) \
  43           template < \
  44             BOOST_PP_ENUM_PARAMS(BOOST_METAPARSE_LIMIT_STRING_SIZE, int C), \
  45             int Ch \
  46           > \
  47           struct update_c< \
  48             string<BOOST_PP_ENUM_PARAMS(BOOST_METAPARSE_LIMIT_STRING_SIZE, C)>,\
  49             n, \
  50             Ch \
  51           > : \
  52             string< \
  53               BOOST_PP_ENUM_PARAMS(n, C) BOOST_PP_COMMA_IF(n) \
  54               Ch \
  55               BOOST_PP_REPEAT_FROM_TO( \
  56                 BOOST_PP_INC(n), \
  57                 BOOST_PP_DEC(BOOST_METAPARSE_LIMIT_STRING_SIZE), \
  58                 BOOST_METAPARSE_ARGN, \
  59                 ~ \
  60               ) \
  61             > \
  62           {};
  63
  64         BOOST_PP_REPEAT(
  65           BOOST_METAPARSE_LIMIT_STRING_SIZE,
  66           BOOST_METAPARSE_UPDATE,
  67           ~
  68         )
  69
  70         #undef BOOST_METAPARSE_UPDATE
  71         #undef BOOST_METAPARSE_ARGN
  72 #else
  73         template <class S, int N, char C>
  74         struct update_c :
  75           concat<
  76             typename split_at_c<N, S>::type::first,
  77             typename
  78               update_c<typename split_at_c<N, S>::type::second, 0, C>::type
  79           >
  80         {};
  81
  82         template <char... Cs, char C, char NewChar>
  83         struct update_c<string<C, Cs...>, 0, NewChar> :
  84           string<NewChar, Cs...>
  85         {};
  86 #endif
  87       }
  88     }
  89   }
  90 }
  91
  92 #endif
  93