#ifndef CONDPARSER_H

#define CONDPARSER_H

/**

 * Copyright (C) 1997-2015 by Dimitri van Heesch.

 *

 * Permission to use, copy, modify, and distribute this software and its

 * documentation under the terms of the GNU General Public License is hereby 

 * granted. No representations are made about the suitability of this software 

 * for any purpose. It is provided "as is" without express or implied warranty.

 * See the GNU General Public License for more details.

 *

 * Documents produced by Doxygen are derivative works derived from the

 * input used in their production; they are not affected by this license.

 *

 * C++ Expression parser for EXTABLED_SETIONS in Doxygen

 *

 * Features used:

 *     Operators:

 *         &&    AND operator

 *         ||    OR  operator

 *         !     NOT operator

 */

#include <qcstring.h>

class CondParser

{

  // public functions

  public:

    CondParser() : m_e(0), m_tokenType(NOTHING) {}

    bool parse(const char *fileName,int lineNr,const char *expr);

    // enumerations

  private:

    enum TOKENTYPE

    {

      NOTHING = -1,

      DELIMITER,

      VARIABLE,

      UNKNOWN

    };

    enum OPERATOR_ID

    {

      UNKNOWN_OP = -1,

      AND = 1,

      OR,

      NOT

    };

    // data

  private:

    QCString m_err;                 //!< error state

    QCString m_expr;                //!< holds the expression

    const char *m_e;                //!< points to a character in expr

    QCString m_token;               //!< holds the token

    TOKENTYPE m_tokenType;          //!< type of the token

    // private functions

  private:

    void getToken();

    bool parseLevel1();

    bool parseLevel2();

    bool parseLevel3();

    bool parseVar();

    bool evalOperator(const int opId, bool lhs, bool rhs);

    bool evalVariable(const char *varName);

    int getOperatorId(const QCString &opName);

};

#endif