ceph/src/boost/boost/metaparse/v1/change_error_message.hpp

   1 #ifndef BOOST_METAPARSE_V1_CHANGE_ERROR_MESSAGE_HPP
   2 #define BOOST_METAPARSE_V1_CHANGE_ERROR_MESSAGE_HPP
   3
   4 //    Copyright Abel Sinkovics (abel@sinkovics.hu) 2011.
   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/reject.hpp>
  11
  12 #include <boost/mpl/eval_if.hpp>
  13
  14 namespace boost
  15 {
  16   namespace metaparse
  17   {
  18     namespace v1
  19     {
  20       template <class P, class Msg>
  21       struct change_error_message
  22       {
  23         template <class S, class Pos>
  24         struct apply :
  25           boost::mpl::eval_if<
  26             typename is_error<typename P::template apply<S, Pos> >::type,
  27             reject<Msg, Pos>,
  28             typename P::template apply<S, Pos>
  29           >
  30         {};
  31
  32         typedef change_error_message type;
  33       };
  34     }
  35   }
  36 }
  37
  38 #endif
  39