printable.h

00001 
00002 /***************************************************************************
00003  *  printable.h - Printable interface
00004  *
00005  *  Created: Tue Oct 07 14:37:22 2008
00006  *  Copyright  2008  Daniel Beck
00007  *
00008  ****************************************************************************/
00009 
00010 /*  This program is free software; you can redistribute it and/or modify
00011  *  it under the terms of the GNU General Public License as published by
00012  *  the Free Software Foundation; either version 2 of the License, or
00013  *  (at your option) any later version. A runtime exception applies to
00014  *  this software (see LICENSE.GPL_WRE file mentioned below for details).
00015  *
00016  *  This program is distributed in the hope that it will be useful,
00017  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  *  GNU Library General Public License for more details.
00020  *
00021  *  Read the full text in the LICENSE.GPL_WRE file in the doc directory.
00022  */
00023 
00024 #ifndef __GEOMETRY_PRINTABLE_H_
00025 #define __GEOMETRY_PRINTABLE_H_
00026 
00027 #include <ostream>
00028 
00029 namespace fawkes {
00030   class Printable;
00031 }
00032 
00033 std::ostream& operator<<(std::ostream& stream, const fawkes::Printable& p);
00034 
00035 namespace fawkes {
00036 
00037 class Printable
00038 {
00039   friend std::ostream& ::operator<<(std::ostream& stream, const Printable& p);
00040 
00041  public:
00042   Printable();
00043   virtual ~Printable();
00044 
00045  protected:
00046   virtual std::ostream& print(std::ostream& stream) const =0;
00047 };
00048 
00049 }
00050 
00051 #endif /* __GEOMETRY_PRINTABLE_H_ */

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