description_def.hpp

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//
// Struct description
//
// Copyright (c) 2015, Christof Metzger-Kraus, Helmholtz-Zentrum Berlin
// All rights reserved
//
// This file is part of OPAL.
//
// OPAL is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// You should have received a copy of the GNU General Public License
// along with OPAL. If not, see <https://www.gnu.org/licenses/>.
//
#ifndef DESCRIPTION_DEF_HPP_
#define DESCRIPTION_DEF_HPP_
 
#include "description.hpp"
 
#include <boost/spirit/include/phoenix_core.hpp>
#include <boost/spirit/include/phoenix_operator.hpp>
#include <boost/spirit/include/phoenix_fusion.hpp>
#include <boost/spirit/include/phoenix_bind.hpp>
 
namespace SDDS { namespace parser
{
    template <typename Iterator>
    description_parser<Iterator>::description_parser(error_handler<Iterator> & _error_handler):
        description_parser::base_type(start)
    {
        using qi::on_error;
        using qi::fail;
        using phx::function;
        typedef function<error_handler<Iterator> > error_handler_function;
 
        qi::_1_type _1;
        qi::_3_type _3;
        qi::_4_type _4;
        qi::lexeme_type lexeme;
        qi::lit_type lit;
        qi::char_type char_;
        qi::_val_type _val;
 
        quoted_string %= lexeme['"' >> +(char_ - '"') >> '"'];
        description_text = lit("text") > '=' > quoted_string;
        description_content = lit("contents") > '=' > quoted_string;
 
        start =
                lit("&description")
                > ((description_text[phx::at_c<0>(_val) = _1]
                   > -(',' > description_content[phx::at_c<1>(_val) = _1]))
                  |(description_content[phx::at_c<1>(_val) = _1]
                    > -(',' > description_text[phx::at_c<0>(_val) = _1])))
                > lit("&end");
 
        BOOST_SPIRIT_DEBUG_NODES(
            (start)
        )
 
        on_error<fail>(start,
            error_handler_function(_error_handler)(
                                                   std::string("Error! Expecting "), _4, _3));
    }
}}
#endif /* DESCRIPTION_DEF_HPP_ */