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 /****************************************************************************************
  * Copyright (c) 2006 Gbor Lehel <illissius@gmail.com>                                  *
  *                                                                                      *
  * 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, see <http://www.gnu.org/licenses/>.                           *
  ****************************************************************************************/
 
 #ifndef AMAROK_EXPRESSION_H
 #define AMAROK_EXPRESSION_H
 
 #include <QList>
 #include <QString>
 
 #include <utility>
 
 struct expression_element
 {
     QString field;
     QString text;
     bool negate: 1;
     enum { Contains, Equals, Less, More } match: 2;
     expression_element(): negate( false ), match( Contains ) { }
 
     // workaround for gcc bug 56235
     expression_element(const expression_element&) = default;
     expression_element& operator=(const expression_element&) = default;
     expression_element(expression_element&& o)
         : field(std::move(o.field))
         , text(std::move(o.text))
         , negate(o.negate)
         , match(o.match)
         {}
     expression_element& operator=(expression_element&& o)
     {
         field = std::move(o.field);
         text = std::move(o.text);
         negate = o.negate;
         match = o.match;
         return *this;
     }
 };
 typedef QList<expression_element> or_list;
 
 typedef QList<or_list> ParsedExpression;
 
 class ExpressionParser
 {
     public:
         explicit ExpressionParser( const QString &expression );
         ParsedExpression parse();
         static ParsedExpression parse( const QString &expression );
 
         static bool isAdvancedExpression( const QString &expression );
 
     private:
         void parseChar(   const QChar &c );
         void handleSpace( const QChar &c );
         void handleMinus( const QChar &c );
         void handleColon( const QChar &c );
         void handleMod(   const QChar &c );
         void handleQuote( const QChar &c );
         void handleChar(  const QChar &c );
         void finishedToken();
         void finishedElement();
         void finishedOrGroup();
 
         const QString &m_expression;
         enum State { ExpectMinus, ExpectField, ExpectMod, ExpectText };
         int m_state;
         bool m_haveGroup;
         bool m_inQuote;
         bool m_inOrGroup;
         QString m_string;
         expression_element m_element;
         or_list m_or;
         ParsedExpression m_parsed;
 };
 
 
 #endif