ceph/src/boost/boost/metaparse/v1/impl/one_of_fwd_op.hpp

   1 #ifndef BOOST_METAPARSE_V1_IMPL_ONE_OF_FWD_OP_HPP
   2 #define BOOST_METAPARSE_V1_IMPL_ONE_OF_FWD_OP_HPP
   3
   4 // Copyright Abel Sinkovics (abel@sinkovics.hu)  2015.
   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/impl/later_result.hpp>
  11
  12 #include <boost/mpl/eval_if.hpp>
  13
  14 namespace boost
  15 {
  16   namespace metaparse
  17   {
  18     namespace v1
  19     {
  20       namespace impl
  21       {
  22         template <class S, class Pos>
  23         struct one_of_fwd_op
  24         {
  25           typedef one_of_fwd_op type;
  26
  27           template <class State, class P>
  28           struct apply :
  29             boost::mpl::eval_if<
  30               typename is_error<State>::type,
  31               boost::mpl::eval_if<
  32                 typename is_error<typename P::template apply<S, Pos> >::type,
  33                 later_result<State, typename P::template apply<S, Pos> >,
  34                 typename P::template apply<S, Pos>
  35               >,
  36               State
  37             >
  38           {};
  39         };
  40       }
  41     }
  42   }
  43 }
  44
  45 #endif
  46