Source: kalamaris/variable.h


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/*  variable.h - 
    This file is part of Kalamaris
    Copyright (C) 2000  Antonio Larrosa Jimenez
    Kalamaris' homepage : http://perso.wanadoo.es/antlarr/kalamaris.html

    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., 675 Mass Ave, Cambridge, MA 02139, USA. 

    Send comments and bug fixes to Antonio Larrosa <larrosa@kde.org>

 ***************************************************************************/
#include "map.h"

class Variable : public Map
{
protected:
  bool m_noSubstitute;
    
public:
  Variable(const QString &nam,bool nosubstitute=false);
  Variable(const Variable &v);

  virtual Map *copy(void) const;
  virtual Map *eval (const QDict <Map> &vars);
  virtual QString string(void) const;

  Map *derive(const Variable &var, const QDict <Map> &vars);

  virtual void propagateForceEvaluation( bool b=true );

  bool allowSubstitution() const { return !m_noSubstitute; };
  void setAllowSubstitution(bool b) { m_noSubstitute=!b; };
};

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