node.h

Go to the documentation of this file.

#ifndef NODE_CLASS
#define NODE_CLASS
 
/*****************************************************************************\
*                                                                             *
*  Name   : node                                                              *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 1992-$now By Author.  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 is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/
 
#include <basis/definitions.h>
 
namespace nodes {
 
// forward:
class node_link_amorph;
 
 
class node : public virtual basis::root_object
{
public:
  node(int number_of_links = 0);
 
  virtual ~node();
 
  int links() const;
 
  void set_link(int link_number, node *new_link);
 
  node *get_link(int link_number) const;
 
  void zap_link(int link_number);
 
  void insert_link(int where, node *to_add = NULL_POINTER);
 
  int which(node *to_find) const;
 
private:
  node_link_amorph *_links;  
 
  void set_empty(int link_number);
 
  // disallowed:
  node(const node &);
  node &operator =(const node &);
};
 
 
 
template <class contents>
class basket : public node
{
public:
  basket(int links, const contents &to_store = contents())
          : node(links), _storage(to_store) {}
 
  basket(const basket &to_copy) { *this = to_copy; }
 
  basket &operator = (const contents &to_copy)
          { if (&to_copy != this) _storage = to_copy; return *this; }
 
  const contents &stored() const { return _storage; }
  contents &stored() { return _storage; }
 
private:
  contents _storage;
};
 
} // end namespace.
 
#endif