metaparse/v1/fail_tag.hpp

0001 #ifndef BOOST_METAPARSE_V1_FAIL_TAG_HPP
0002 #define BOOST_METAPARSE_V1_FAIL_TAG_HPP
0003
0004 // Copyright Abel Sinkovics (abel@sinkovics.hu)  2009 - 2012.
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
0010 #include <boost/metaparse/v1/fwd/get_message.hpp>
0011 #include <boost/metaparse/v1/fwd/get_position.hpp>
0012
0013 #include <iostream>
0014
0015 namespace boost
0016 {
0017   namespace metaparse
0018   {
0019     namespace v1
0020     {
0021       struct fail_tag { typedef fail_tag type; };
0022
0023       template <>
0024       struct get_message_impl<fail_tag>
0025       {
0026         template <class A>
0027         struct apply { typedef typename A::message type; };
0028       };
0029
0030       template <>
0031       struct get_position_impl<fail_tag>
0032       {
0033         template <class A>
0034         struct apply : A::source_position {};
0035       };
0036     }
0037   }
0038 }
0039
0040 #endif
0041
0042