ceph/src/boost/boost/metaparse/v1/cpp11/impl/nth_of_c_skip_remaining.hpp

   1 #ifndef BOOST_METAPARSE_V1_CPP11_IMPL_NTH_OF_C_SKIP_REMANING_HPP
   2 #define BOOST_METAPARSE_V1_CPP11_IMPL_NTH_OF_C_SKIP_REMANING_HPP
   3
   4 // Copyright Abel Sinkovics (abel@sinkovics.hu)  2017.
   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/get_remaining.hpp>
  11 #include <boost/metaparse/v1/get_position.hpp>
  12 #include <boost/metaparse/v1/return_.hpp>
  13
  14 #include <type_traits>
  15
  16 namespace boost
  17 {
  18   namespace metaparse
  19   {
  20     namespace v1
  21     {
  22       namespace impl
  23       {
  24         template <class FinalResult, class S, class Pos, class... Ps>
  25         struct nth_of_c_skip_remaining;
  26
  27         template <class FinalResult, class S, class Pos>
  28         struct nth_of_c_skip_remaining<FinalResult, S, Pos> :
  29           return_<FinalResult>::template apply<S, Pos>
  30         {};
  31
  32         template <class FinalResult, class S, class Pos, class P, class... Ps>
  33         struct nth_of_c_skip_remaining<FinalResult, S, Pos, P, Ps...>
  34         {
  35         private:
  36           template <class NextResult>
  37           struct apply_unchecked :
  38             nth_of_c_skip_remaining<
  39               FinalResult,
  40               typename get_remaining<NextResult>::type,
  41               typename get_position<NextResult>::type,
  42               Ps...
  43             >
  44           {};
  45         public:
  46           typedef
  47             typename std::conditional<
  48               is_error<typename P::template apply<S, Pos>>::type::value,
  49               typename P::template apply<S, Pos>,
  50               apply_unchecked<typename P::template apply<S, Pos>>
  51             >::type::type
  52             type;
  53         };
  54       }
  55     }
  56   }
  57 }
  58
  59 #endif
  60