delimiter_rule.hpp

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//
// (c) Copyright 2013 DESY, Eugen Wintersberger <eugen.wintersberger@desy.de>
//
// This file is part of libpniio.
//
// libpniio 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 2 of the License, or
// (at your option) any later version.
//
// libpniio is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with libpniio.  If not, see <http://www.gnu.org/licenses/>.
// ===========================================================================
//
// Created on: May 6, 2013
//     Author: Eugen Wintersberger <eugen.wintersberger@desy.de>
//
//
#pragma once

#include <pni/core/types.hpp>
#include <boost/spirit/include/qi.hpp>

namespace pni{
namespace io{

    template<typename ITERT >
    struct delimiter_rule : boost::spirit::qi::grammar<ITERT,
                                                       pni::core::string()>
    {
        boost::spirit::qi::rule<ITERT,pni::core::string()> delimiter;

        //--------------------------------------------------------------------
        delimiter_rule() : 
            delimiter_rule::base_type(delimiter)
        {
            using namespace boost::spirit;
            //default behavior - at least one whitespace is a valid delimiter
            delimiter = +qi::blank;
        }

        //--------------------------------------------------------------------
        delimiter_rule(char symbol):
            delimiter_rule::base_type(delimiter)
        {
            using namespace boost::spirit;
            if(symbol == ' ')
                delimiter = +qi::blank;
            else
                delimiter = *qi::blank>>qi::char_(symbol)>>*qi::blank;
        }

    };

//end of namespace
}
}