Panda3D

weakPointerToBase.h

00001 // Filename: weakPointerToBase.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 WEAKPOINTERTOBASE_H
00016 #define WEAKPOINTERTOBASE_H
00017 
00018 #include "pandabase.h"
00019 #include "pointerToBase.h"
00020 #include "weakPointerToVoid.h"
00021 
00022 ////////////////////////////////////////////////////////////////////
00023 //       Class : WeakPointerToBase
00024 // Description : This is the base class for PointerTo and
00025 //               ConstPointerTo.  Don't try to use it directly; use
00026 //               either derived class instead.
00027 ////////////////////////////////////////////////////////////////////
00028 template <class T>
00029 class WeakPointerToBase : public WeakPointerToVoid {
00030 public:
00031   typedef T To;
00032 
00033 protected:
00034   INLINE WeakPointerToBase(To *ptr);
00035   INLINE WeakPointerToBase(const PointerToBase<T> &copy);
00036   INLINE WeakPointerToBase(const WeakPointerToBase<T> &copy);
00037   INLINE ~WeakPointerToBase();
00038 
00039   void reassign(To *ptr);
00040   INLINE void reassign(const PointerToBase<To> &copy);
00041   INLINE void reassign(const WeakPointerToBase<To> &copy);
00042 
00043   // No assignment or retrieval functions are declared in
00044   // WeakPointerToBase, because we will have to specialize on const
00045   // vs. non-const later.
00046 
00047 public:
00048   // These comparison functions are common to all things PointerTo, so
00049   // they're defined up here.
00050 #ifndef CPPPARSER
00051 #ifndef WIN32_VC
00052   INLINE bool operator == (const To *other) const;
00053   INLINE bool operator != (const To *other) const;
00054   INLINE bool operator > (const To *other) const;
00055   INLINE bool operator <= (const To *other) const;
00056   INLINE bool operator >= (const To *other) const;
00057   INLINE bool operator == (To *other) const;
00058   INLINE bool operator != (To *other) const;
00059   INLINE bool operator > (To *other) const;
00060   INLINE bool operator <= (To *other) const;
00061   INLINE bool operator >= (To *other) const;
00062 
00063   INLINE bool operator == (const WeakPointerToBase<To> &other) const;
00064   INLINE bool operator != (const WeakPointerToBase<To> &other) const;
00065   INLINE bool operator > (const WeakPointerToBase<To> &other) const;
00066   INLINE bool operator <= (const WeakPointerToBase<To> &other) const;
00067   INLINE bool operator >= (const WeakPointerToBase<To> &other) const;
00068 
00069   INLINE bool operator == (const PointerToBase<To> &other) const;
00070   INLINE bool operator != (const PointerToBase<To> &other) const;
00071   INLINE bool operator > (const PointerToBase<To> &other) const;
00072   INLINE bool operator <= (const PointerToBase<To> &other) const;
00073   INLINE bool operator >= (const PointerToBase<To> &other) const;
00074 #endif  // WIN32_VC
00075   INLINE bool operator < (const To *other) const;
00076   INLINE bool operator < (const WeakPointerToBase<To> &other) const;
00077   INLINE bool operator < (const PointerToBase<To> &other) const;
00078 #endif  // CPPPARSER
00079 
00080 PUBLISHED:
00081   INLINE void clear();
00082   INLINE void refresh() const;
00083 
00084   void output(ostream &out) const;
00085 };
00086 
00087 template<class T>
00088 INLINE ostream &operator <<(ostream &out, const WeakPointerToBase<T> &pointer) {
00089   pointer.output(out);
00090   return out;
00091 }
00092 
00093 #include "weakPointerToBase.I"
00094 
00095 #endif
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