base/Hashable

Go to the documentation of this file.

/* **-*-c++-*-**************************************************************
  Copyright (C)2003 David Jung <opensim@pobox.com>

  This program/file 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. (http://www.gnu.org)
        
  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  $Id: Hashable 1029 2004-02-11 20:45:54Z jungd $
  $Revision: 1.1 $
  $Date: 2004-02-11 15:45:54 -0500 (Wed, 11 Feb 2004) $
  $Author: jungd $
 
****************************************************************************/

#ifndef _BASE_HASHABLE_
#define _BASE_HASHABLE_

#include <base/base>
#include <base/array>

namespace base {


/** 
 * Interface for objects that can generate hash codes over themselves
 */
class Hashable
{
public:
  /// Whenever invoked on the same object more than once, the same byte array must be returned,
  ///  provided no information used in == comparisons on the object is modified.
  virtual base::array<base::Byte> hashCode() const = 0;
};


} // base

#endif

---