Panda3D
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pointerToBase.h
00001 // Filename: pointerToBase.h
00002 // Created by:  drose (27Sep04)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #ifndef POINTERTOBASE_H
00016 #define POINTERTOBASE_H
00017 
00018 #include "pandabase.h"
00019 #include "pointerToVoid.h"
00020 #include "referenceCount.h"
00021 #include "typedef.h"
00022 #include "memoryUsage.h"
00023 #include "config_express.h"
00024 
00025 ////////////////////////////////////////////////////////////////////
00026 //       Class : PointerToBase
00027 // Description : This is the base class for PointerTo and
00028 //               ConstPointerTo.  Don't try to use it directly; use
00029 //               either derived class instead.
00030 ////////////////////////////////////////////////////////////////////
00031 template <class T>
00032 class PointerToBase : public PointerToVoid {
00033 public:
00034   typedef T To;
00035 
00036 protected:
00037   INLINE PointerToBase(To *ptr);
00038   INLINE PointerToBase(const PointerToBase<T> &copy);
00039   INLINE ~PointerToBase();
00040 
00041   INLINE void reassign(To *ptr);
00042   INLINE void reassign(const PointerToBase<To> &copy);
00043 
00044 #ifdef DO_MEMORY_USAGE
00045   void update_type(To *ptr);
00046 #endif  // DO_MEMORY_USAGE
00047 
00048   // No assignment or retrieval functions are declared in
00049   // PointerToBase, because we will have to specialize on const
00050   // vs. non-const later.
00051 
00052 PUBLISHED:
00053   INLINE void clear();
00054 
00055   void output(ostream &out) const;
00056 };
00057 
00058 template<class T>
00059 INLINE ostream &operator <<(ostream &out, const PointerToBase<T> &pointer) {
00060   pointer.output(out);
00061   return out;
00062 }
00063 
00064 #include "pointerToBase.I"
00065 
00066 #endif
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