ceph/src/boost/libs/spirit/example/x3/calc/calc9/error_handler.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2014 Joel de Guzman
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 =============================================================================*/
   7 #if !defined(BOOST_SPIRIT_X3_CALC9_ERROR_HANDLER_HPP)
   8 #define BOOST_SPIRIT_X3_CALC9_ERROR_HANDLER_HPP
   9
  10 #include <boost/spirit/home/x3.hpp>
  11 #include <boost/spirit/home/x3/support/utility/error_reporting.hpp>
  12 #include <boost/spirit/home/x3/support/ast/position_tagged.hpp>
  13 #include "expression.hpp"
  14 #include "statement.hpp"
  15
  16 namespace client { namespace parser
  17 {
  18     namespace x3 = boost::spirit::x3;
  19
  20     ////////////////////////////////////////////////////////////////////////////
  21     //  Our error handler
  22     ////////////////////////////////////////////////////////////////////////////
  23     template <typename Iterator>
  24     using error_handler = x3::error_handler<Iterator>;
  25
  26     // tag used to get our error handler from the context
  27     using error_handler_tag = x3::error_handler_tag;
  28
  29     struct error_handler_base
  30     {
  31         template <typename Iterator, typename Exception, typename Context>
  32         x3::error_handler_result on_error(
  33             Iterator& first, Iterator const& last
  34           , Exception const& x, Context const& context)
  35         {
  36             std::string message = "Error! Expecting: " + x.which() + " here:";
  37             auto& error_handler = x3::get<error_handler_tag>(context).get();
  38             error_handler(x.where(), message);
  39             return x3::error_handler_result::fail;
  40         }
  41     };
  42 }}
  43
  44 #endif