spirit/example/x3/calc/calc9/error_handler.hpp
Mario Lang 033e52c039 Make annotation.hpp generic and move to support/utility/annotate_on_success.hpp.
Since X3 promotes x3::variant, we can actually make annotation.hpp
generic, avoiding copy-pastism in all the projects that make use of
basic error reporting.
2015-05-18 14:35:52 +02:00

45 lines
1.7 KiB
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/*=============================================================================
Copyright (c) 2001-2014 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_CALC9_ERROR_HANDLER_HPP)
#define BOOST_SPIRIT_X3_CALC9_ERROR_HANDLER_HPP
#include <boost/spirit/home/x3.hpp>
#include <boost/spirit/home/x3/support/utility/error_reporting.hpp>
#include <boost/spirit/home/x3/support/ast/position_tagged.hpp>
#include "expression.hpp"
#include "statement.hpp"
namespace client { namespace parser
{
namespace x3 = boost::spirit::x3;
////////////////////////////////////////////////////////////////////////////
// Our error handler
////////////////////////////////////////////////////////////////////////////
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
{
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::string message = "Error! Expecting: " + x.which() + " here:";
auto& error_handler = x3::get<error_handler_tag>(context).get();
error_handler(x.where(), message);
return x3::error_handler_result::fail;
}
};
}}
#endif