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

   1 #ifndef BOOST_METAPARSE_V1_TRANSFORM_ERROR_HPP
   2 #define BOOST_METAPARSE_V1_TRANSFORM_ERROR_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
  11 #include <boost/mpl/eval_if.hpp>
  12
  13 namespace boost
  14 {
  15   namespace metaparse
  16   {
  17     namespace v1
  18     {
  19       template <class P, class F>
  20       struct transform_error
  21       {
  22         template <class S, class Pos>
  23         struct apply :
  24           boost::mpl::eval_if<
  25             typename is_error<typename P::template apply<S, Pos> >::type,
  26             typename F::template apply<
  27               typename P::template apply<S, Pos>::type
  28             >,
  29             typename P::template apply<S, Pos>
  30           >
  31         {};
  32
  33         typedef transform_error type;
  34       };
  35     }
  36   }
  37 }
  38
  39 #endif
  40