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

   1 #ifndef BOOST_METAPARSE_V1_IMPL_ITERATE_IMPL_HPP
   2 #define BOOST_METAPARSE_V1_IMPL_ITERATE_IMPL_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/impl/iterate_impl_unchecked.hpp>
  10 #include <boost/metaparse/v1/return_.hpp>
  11 #include <boost/metaparse/v1/is_error.hpp>
  12
  13 #include <boost/mpl/eval_if.hpp>
  14
  15 namespace boost
  16 {
  17   namespace metaparse
  18   {
  19     namespace v1
  20     {
  21       namespace impl
  22       {
  23         template <int N, class P, class Accum>
  24         struct iterate_impl
  25         {
  26           typedef iterate_impl type;
  27
  28           template <class S, class Pos>
  29           struct apply :
  30             boost::mpl::eval_if<
  31               typename is_error<typename P::template apply<S, Pos> >::type,
  32               typename P::template apply<S, Pos>,
  33               iterate_impl_unchecked<N, P, Accum, S, Pos>
  34             >
  35           {};
  36         };
  37
  38         template <class P, class Accum>
  39         struct iterate_impl<0, P, Accum> : return_<Accum> {};
  40       }
  41     }
  42   }
  43 }
  44
  45 #endif
  46