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

   1 #ifndef BOOST_METAPARSE_V1_TRANSFORM_HPP
   2 #define BOOST_METAPARSE_V1_TRANSFORM_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/accept.hpp>
  10 #include <boost/metaparse/v1/get_result.hpp>
  11 #include <boost/metaparse/v1/get_remaining.hpp>
  12 #include <boost/metaparse/v1/get_position.hpp>
  13 #include <boost/metaparse/v1/unless_error.hpp>
  14
  15 #include <boost/mpl/eval_if.hpp>
  16
  17 namespace boost
  18 {
  19   namespace metaparse
  20   {
  21     namespace v1
  22     {
  23       template <class P, class T>
  24       struct transform
  25       {
  26       private:
  27         template <class S, class Pos>
  28         struct no_error :
  29           accept<
  30             typename T::template apply<
  31               typename get_result<typename P::template apply<S, Pos> >::type
  32             >::type,
  33             get_remaining<typename P::template apply<S, Pos> >,
  34             get_position<typename P::template apply<S, Pos> >
  35           >
  36         {};
  37       public:
  38         typedef transform type;
  39
  40         template <class S, class Pos>
  41         struct apply :
  42           unless_error<typename P::template apply<S, Pos>, no_error<S, Pos> >
  43         {};
  44       };
  45     }
  46   }
  47 }
  48
  49 #endif
  50