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gptr.h

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#ifndef _GPTR_H_
#define _GPTR_H_
#include <coconut_config.h>

template <class _Tp>
class gptr
{
private:
  typedef _Tp& reference;
  typedef _Tp* pointer;
  typedef const _Tp& const_reference;
  typedef const _Tp* const_pointer;
public:
  virtual ~gptr() {}

  virtual reference operator*() PURE_VIRTUAL
  virtual const_reference operator*() const PURE_VIRTUAL

  virtual pointer operator->() PURE_VIRTUAL
  virtual const_pointer operator->() const PURE_VIRTUAL

  virtual pointer get_local_copy() PURE_VIRTUAL
  virtual const_pointer get_local_copy() const PURE_VIRTUAL
};

template <class _Tp>
class ptr : public gptr<_Tp>
{
private:
  typedef ptr<_Tp> _Self;

  typedef _Tp& reference;
  typedef _Tp* pointer;
  typedef const _Tp& const_reference;
  typedef const _Tp* const_pointer;
  
  _Tp* _p;
public:
  ptr(_Tp& __p) : _p(&__p) {}
  ptr(_Tp* __p) : _p(__p) {}
  ptr(const _Self& __p) : _p(__p._p) {}

  ~ptr() {}

  reference operator*() { return *_p; }
  const_reference operator*() const { return *_p; }

  pointer operator->() { return _p; }
  const_pointer operator->() const { return _p; }

  pointer get_local_copy() { return _p; }
  const_pointer get_local_copy() const { return _p; }

  _Self& operator=(const _Self& __p) { _p = __p._p; return *this; }
  _Self& operator=(_Tp& __p) { _p = &__p; return *this; }
};

#endif /* _GPTR_H_ */

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