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

   1 #ifndef BOOST_METAPARSE_V1_IMPL_SKIP_SEQ_HPP
   2 #define BOOST_METAPARSE_V1_IMPL_SKIP_SEQ_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/is_error.hpp>
  10 #include <boost/metaparse/v1/accept.hpp>
  11 #include <boost/metaparse/v1/get_remaining.hpp>
  12 #include <boost/metaparse/v1/get_position.hpp>
  13 #include <boost/metaparse/v1/get_result.hpp>
  14
  15 namespace boost
  16 {
  17   namespace metaparse
  18   {
  19     namespace v1
  20     {
  21       namespace impl
  22       {
  23         struct skip_seq
  24         {
  25         private:
  26           template <class ParsingResult, class NewResultValue>
  27           struct change_result :
  28             accept<
  29               NewResultValue,
  30               typename get_remaining<ParsingResult>::type,
  31               typename get_position<ParsingResult>::type
  32             >
  33           {};
  34
  35           template <class Result, class P>
  36           struct apply_unchecked :
  37             boost::mpl::eval_if<
  38               typename is_error<
  39                 typename P::template apply<
  40                   typename get_remaining<Result>::type,
  41                   typename get_position<Result>::type
  42                 >
  43               >::type,
  44               typename P::template apply<
  45                 typename get_remaining<Result>::type,
  46                 typename get_position<Result>::type
  47               >,
  48               change_result<
  49                 typename P::template apply<
  50                   typename get_remaining<Result>::type,
  51                   typename get_position<Result>::type
  52                 >,
  53                 typename get_result<Result>::type
  54               >
  55             >
  56           {};
  57
  58         public:
  59           template <class Result, class P>
  60           struct apply :
  61             boost::mpl::eval_if<
  62               is_error<Result>,
  63               Result,
  64               apply_unchecked<Result, P>
  65             >
  66           {};
  67         };
  68       }
  69     }
  70   }
  71 }
  72
  73 #endif
  74