| /*============================================================================= |
| Copyright (c) 2001-2015 Joel de Guzman |
| |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| =============================================================================*/ |
| #if !defined(BOOST_SPIRIT_X3_REPR_ERROR_HANDLER_HPP) |
| #define BOOST_SPIRIT_X3_REPR_ERROR_HANDLER_HPP |
| |
| #include "rexpr.hpp" |
| |
| #include <boost/spirit/home/x3/support/ast/position_tagged.hpp> |
| #include <boost/spirit/home/x3/support/utility/error_reporting.hpp> |
| |
| #include <map> |
| |
| namespace rexpr { namespace parser |
| { |
| namespace x3 = boost::spirit::x3; |
| |
| //////////////////////////////////////////////////////////////////////////// |
| // Our error handler |
| //////////////////////////////////////////////////////////////////////////// |
| // X3 Error Handler Utility |
| template <typename Iterator> |
| using error_handler = x3::error_handler<Iterator>; |
| |
| // tag used to get our error handler from the context |
| using error_handler_tag = x3::error_handler_tag; |
| |
| struct error_handler_base |
| { |
| error_handler_base(); |
| |
| template <typename Iterator, typename Exception, typename Context> |
| x3::error_handler_result on_error( |
| Iterator& first, Iterator const& last |
| , Exception const& x, Context const& context); |
| |
| std::map<std::string, std::string> id_map; |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////// |
| // Implementation |
| //////////////////////////////////////////////////////////////////////////// |
| |
| inline error_handler_base::error_handler_base() |
| { |
| id_map["rexpr"] = "RExpression"; |
| id_map["rexpr_value"] = "Value"; |
| id_map["rexpr_key_value"] = "Key value pair"; |
| } |
| |
| template <typename Iterator, typename Exception, typename Context> |
| inline x3::error_handler_result |
| error_handler_base::on_error( |
| Iterator& first, Iterator const& last |
| , Exception const& x, Context const& context) |
| { |
| std::string which = x.which(); |
| auto iter = id_map.find(which); |
| if (iter != id_map.end()) |
| which = iter->second; |
| |
| std::string message = "Error! Expecting: " + which + " here:"; |
| auto& error_handler = x3::get<error_handler_tag>(context).get(); |
| error_handler(x.where(), message); |
| return x3::error_handler_result::fail; |
| } |
| }} |
| |
| #endif |