CDE/cde/programs/nsgmls/HashTableItemBase.h

/*
 * CDE - Common Desktop Environment
 *
 * Copyright (c) 1993-2012, The Open Group. All rights reserved.
 *
 * These libraries and programs are free software; you can
 * redistribute them and/or modify them under the terms of the GNU
 * Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * These libraries and programs are distributed in the hope that
 * they 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 these libraries and programs; if not, write
 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301 USA
 */
/* $XConsortium: HashTableItemBase.h /main/1 1996/07/29 16:53:09 cde-hp $ */
// Copyright (c) 1994 James Clark
// See the file COPYING for copying permission.

#ifndef HashTableItemBase_INCLUDED
#define HashTableItemBase_INCLUDED 1

// All hash tables with the same type of key share object code.
// The cost of this is a virtual dtor in HashTableItemBase.

#ifdef SP_NAMESPACE
namespace SP_NAMESPACE {
#endif

template<class K>
class HashTableItemBase {
public:
  HashTableItemBase(const K &k);
  virtual ~HashTableItemBase();
  virtual HashTableItemBase<K> *copy() const = 0;
  K key;
};

template<class K>
struct HashTableKeyFunction {
  static inline const K &key(const HashTableItemBase<K> &obj) {
    return obj.key;
  }
};

#ifdef SP_NAMESPACE
}
#endif

#endif /* not HashTableItemBase_INCLUDED */

#ifdef SP_DEFINE_TEMPLATES
#include "HashTableItemBase.C"
#endif