v1/error/unpaired.hpp

0001 #ifndef BOOST_METAPARSE_V1_ERROR_UNPAIRED_HPP
0002 #define BOOST_METAPARSE_V1_ERROR_UNPAIRED_HPP
0003
0004 // Copyright Abel Sinkovics (abel@sinkovics.hu)  2015.
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/mpl/vector.hpp>
0010
0011 #include <iostream>
0012 #include <string>
0013 #include <sstream>
0014
0015 namespace boost
0016 {
0017   namespace metaparse
0018   {
0019     namespace v1
0020     {
0021       namespace error
0022       {
0023         template <int Line, int Col, class Msg = boost::mpl::na>
0024         struct unpaired
0025         {
0026           typedef unpaired type;
0027
0028           static std::string get_value()
0029           {
0030             std::ostringstream s;
0031             s << Msg::get_value() << " (see " << Line << ":" << Col << ")";
0032             return s.str();
0033           }
0034         };
0035
0036         template <int Line, int Col>
0037         struct unpaired<Line, Col, boost::mpl::na>
0038         {
0039           typedef unpaired type;
0040
0041           template <class Msg = boost::mpl::na>
0042           struct apply : unpaired<Line, Col, Msg> {};
0043         };
0044       }
0045     }
0046   }
0047 }
0048
0049 #endif
0050