Boolean.h

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/*
 * Boolean.h
 *
 * Smalltalk like class library for C++
 * Boolean wrapper. Header.
 *
 * Copyright (c) 2003 Milan Cermak
 */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef __BOOLEAN_H
#define __BOOLEAN_H

#include "Object.h"

namespace Core {

class String;
class Stream;
class Visitor;

class Boolean : public Object
{
  protected:
    bool value;

  public:
    static Boolean True;
    static Boolean False;

    Boolean(bool val);

    operator bool(void);

    /* Class-accessing protocol */
    virtual String *className(void) const;

    /* Comparing protocol */
    virtual long hash(void) const;
    virtual bool isEqual(const Object *object) const;
    virtual bool isEqual(const Object &object) const
      { return Object::isEqual(object); }
    virtual bool isEqual(bool cBool) const;

    /* Printing protocol */
    virtual void printOn(Stream *stream) const;

    /* Testing protocol */
    virtual bool isBoolean(void) const;

    /* Visiting protocol */
    virtual void visitBy(Visitor *visitor);
};

};

#endif /* __BOOLEAN_H */

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