text: // Filename: weakNodePath.h
  // Created by:  drose (29Sep04)
  //
  ////////////////////////////////////////////////////////////////////
  //
  // PANDA 3D SOFTWARE
  // Copyright (c) Carnegie Mellon University.  All rights reserved.
  //
  // All use of this software is subject to the terms of the revised BSD
  // license.  You should have received a copy of this license along
  // with this source code in a file named "LICENSE."
  //
  ////////////////////////////////////////////////////////////////////
  
  #ifndef WEAKNODEPATH_H
  #define WEAKNODEPATH_H
  
  #include "pandabase.h"
  
  #include "nodePath.h"
  #include "nodePathComponent.h"
  #include "weakPointerTo.h"
  
  ////////////////////////////////////////////////////////////////////
  //       Class : WeakNodePath
  // Description : This class is a wrapper around a NodePath that,
  //               unlike the actual NodePath class, doesn't hold a
  //               reference count to the node.  Thus the node may be
  //               detached from the scene graph and destructed at any
  //               time.
  //
  //               You can call is_valid() or was_deleted() at any time
  //               to determine whether the node is still around; if it
  //               is, get_node_path() will return the associated
  //               NodePath.
  ////////////////////////////////////////////////////////////////////
  class EXPCL_PANDA_PGRAPH WeakNodePath {
  public:
    INLINE WeakNodePath(const NodePath &node_path);
    INLINE WeakNodePath(const WeakNodePath &copy);
    INLINE ~WeakNodePath();
  
    INLINE void operator = (const NodePath &node_path);
    INLINE void operator = (const WeakNodePath &copy);
  
    INLINE bool is_empty() const;
    INLINE bool was_deleted() const;
  
    INLINE NodePath get_node_path() const;
    INLINE PandaNode *node() const;
  
    INLINE bool operator == (const NodePath &other) const;
    INLINE bool operator != (const NodePath &other) const;
    INLINE bool operator < (const NodePath &other) const;
    INLINE int compare_to(const NodePath &other) const;
  
    INLINE bool operator == (const WeakNodePath &other) const;
    INLINE bool operator != (const WeakNodePath &other) const;
    INLINE bool operator < (const WeakNodePath &other) const;
    INLINE int compare_to(const WeakNodePath &other) const;
  
    INLINE int get_key() const;
  
    void output(ostream &out) const;
  
  private:
    WPT(NodePathComponent) _head;
    int _backup_key;
  };
  
  INLINE ostream &operator << (ostream &out, const WeakNodePath &node_path);
  
  #include "weakNodePath.I"
  
  #endif
  