v1/impl/apply_parser.hpp

0001 #ifndef BOOST_METAPARSE_V1_IMPL_APPLY_PARSER_HPP
0002 #define BOOST_METAPARSE_V1_IMPL_APPLY_PARSER_HPP
0003
0004 // Copyright Abel Sinkovics (abel@sinkovics.hu)  2013.
0005 // Distributed under the Boost Software License, Version 1.0.
0006 //    (See accompanying file LICENSE_1_0.txt or copy at
0007 //          http://www.boost.org/LICENSE_1_0.txt)
0008
0009 #include <boost/metaparse/v1/unless_error.hpp>
0010 #include <boost/metaparse/v1/get_result.hpp>
0011 #include <boost/metaparse/v1/get_remaining.hpp>
0012 #include <boost/metaparse/v1/get_position.hpp>
0013 #include <boost/metaparse/v1/transform.hpp>
0014
0015 #include <boost/mpl/push_back.hpp>
0016
0017 namespace boost
0018 {
0019   namespace metaparse
0020   {
0021     namespace v1
0022     {
0023       namespace impl
0024       {
0025         struct apply_parser
0026         {
0027         private:
0028           template <class ListToAppend>
0029           struct do_append
0030           {
0031             template <class Item>
0032             struct apply : boost::mpl::push_back<ListToAppend, Item> {};
0033           };
0034
0035           template <class Accum, class S, class Pos, class Parser>
0036           struct apply_unchecked :
0037             transform<Parser,do_append<typename Accum::type> >::template apply<
0038               typename S::type,
0039               typename Pos::type
0040             >
0041           {};
0042
0043         public:
0044           template <class State, class Parser>
0045           struct apply :
0046             unless_error<
0047               State,
0048               apply_unchecked<
0049                 get_result<State>,
0050                 get_remaining<State>,
0051                 get_position<State>,
0052                 Parser
0053               >
0054             >
0055           {};
0056         };
0057       }
0058     }
0059   }
0060 }
0061
0062 #endif
0063