bracket_expr.h

/***************************************************************************
 *   Copyright (C) 2006 by Radko Mihal                                     *
 *   rmihal@pobox.sk                                                       *
 *                                                                         *
 *   This program 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.                                   *
 *                                                                         *
 *   This program 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 this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
 ***************************************************************************/
#ifndef BRACKET_EXPRESSIONBRACKET_EXPR_H
#define BRACKET_EXPRESSIONBRACKET_EXPR_H

namespace bracket_expression {


template<typename E>
class bracket_expr
{
typedef typename grammar_to_parser::basic_parser<E>::parser_list 
                                                                                                                                parser_list;
        
        class left_bracket_nonmatching_list_right_bracket{
                grammar_to_parser::basic_terminal<E,'['>                                        
                                                                                                                                m_left_bracket;
                grammar_to_parser::basic_non_terminal<E,nonmatching_list<E> >   
                                                                                                                                m_nonmatching_list;
                grammar_to_parser::basic_terminal<E,']'>                                m_right_bracket;
        public:
                unsigned long recognize( const E* buf, const unsigned long buf_length )
                {
                        return m_nonmatching_list->recognize(buf,buf_length);
                }
                left_bracket_nonmatching_list_right_bracket() :
                         m_nonmatching_list() {};
        
                ~left_bracket_nonmatching_list_right_bracket() {};
                void push_parsers( parser_list &l )
                {
                        l.push_back( &m_left_bracket );
                        l.push_back( &m_nonmatching_list );
                        l.push_back( &m_right_bracket );
                }       
        };
        
        class left_bracket_matching_list_rigth_bracket
        {
                grammar_to_parser::basic_terminal<E,'['>                                        m_left_bracket;
                grammar_to_parser::basic_non_terminal<E,matching_list<E> >      m_matching_list;
                grammar_to_parser::basic_terminal<E,']'>                                        m_right_bracket;
        public:
                unsigned long recognize( const E* buf, const unsigned long buf_length )
                {
                        return m_matching_list->recognize(buf,buf_length);
                }
        public:
                left_bracket_matching_list_rigth_bracket() :
                        m_matching_list() {};
        
                ~left_bracket_matching_list_rigth_bracket() {};
                void push_parsers( parser_list &l )
                {
                        l.push_back( &m_left_bracket );
                        l.push_back( &m_matching_list );
                        l.push_back( &m_right_bracket );
                }       
        
        };      
        
        grammar_to_parser::basic_non_terminal<E,left_bracket_matching_list_rigth_bracket >      
                                                                                                                                        m_matching;
        grammar_to_parser::basic_non_terminal<E,left_bracket_nonmatching_list_right_bracket >
                                                                                                                                        m_nonmatching;
        
public:
        unsigned long recognize( const E* buf, const unsigned long buf_length )
        {
                if( m_matching.is_parsed() )
                {
                        return m_matching->recognize(buf,buf_length);
                }
                else
                {
                        return m_nonmatching->recognize(buf,buf_length);
                }
        }
    bracket_expr() :
                m_matching(),
                m_nonmatching() {};

    ~bracket_expr() {};
        void push_parsers( parser_list &l )
        {
//              l.push_back( &m_matching );
//              l.push_back( &m_nonmatching );
                l.push_back( &m_nonmatching );
                l.push_back( &m_matching );
        }       

};

};

#endif

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