util/autonullptr.hh File Reference

A pointer which gets set to null if the pointed-to object is deleted. More...

#include <ilist.hh>

Go to the source code of this file.

Classes
class	AutoNullPtr< T >
	A pointer which gets set to null if the pointed-to object is deleted. More...
class	AutoNullPtrBase< T >
	Derive from this class to make your class instances referenceable by AutoNullPtr. More...
Functions
The regular pointer tests
template<class T>
bool	operator== (const AutoNullPtr< T > &a, const T *b)
template<class T>
bool	operator== (const T *b, const AutoNullPtr< T > &a)
template<class T>
bool	operator== (const AutoNullPtr< T > &a, const AutoNullPtr< T > &b)
template<class T>
bool	operator!= (const AutoNullPtr< T > &a, const T *b)
template<class T>
bool	operator!= (const T *b, const AutoNullPtr< T > &a)
template<class T>
bool	operator!= (const AutoNullPtr< T > &a, const AutoNullPtr< T > &b)
template<class T>
bool	operator< (const AutoNullPtr< T > &a, const T *b)
template<class T>
bool	operator< (const T *b, const AutoNullPtr< T > &a)
template<class T>
bool	operator< (const AutoNullPtr< T > &a, const AutoNullPtr< T > &b)
template<class T>
bool	operator> (const AutoNullPtr< T > &a, const T *b)
template<class T>
bool	operator> (const T *b, const AutoNullPtr< T > &a)
template<class T>
bool	operator> (const AutoNullPtr< T > &a, const AutoNullPtr< T > &b)
template<class T>
bool	operator<= (const AutoNullPtr< T > &a, const T *b)
template<class T>
bool	operator<= (const T *b, const AutoNullPtr< T > &a)
template<class T>
bool	operator<= (const AutoNullPtr< T > &a, const AutoNullPtr< T > &b)
template<class T>
bool	operator>= (const AutoNullPtr< T > &a, const T *b)
template<class T>
bool	operator>= (const T *b, const AutoNullPtr< T > &a)
template<class T>
bool	operator>= (const AutoNullPtr< T > &a, const AutoNullPtr< T > &b)

---

Detailed Description

A pointer which gets set to null if the pointed-to object is deleted.

Somewhat equivalent to "weak references" in Java.

  class MyClass : public AutoNullPtrBase<MyClass> {
    ... your class members here ...
  } myClass;
  AutoNullPtr<MyClass> ptr = &myClass;

Implementation: AutoNullPtrBase contains the head of a linked list of AutoNullPtrs, sets them all to 0 from its dtor. ~AutoNullPtr removes itself from that list.

---

Function Documentation

template<class T>

bool operator!=	(	const AutoNullPtr< T > &	a,
		const AutoNullPtr< T > &	b
	)			[inline]

References AutoNullPtr< T >::get().

template<class T>

bool operator!=	(	const T *	b,
		const AutoNullPtr< T > &	a
	)			[inline]

References AutoNullPtr< T >::get().

template<class T>

bool operator!=	(	const AutoNullPtr< T > &	a,
		const T *	b
	)			[inline]

References AutoNullPtr< T >::get().

template<class T>

bool operator<	(	const AutoNullPtr< T > &	a,
		const AutoNullPtr< T > &	b
	)			[inline]

template<class T>

bool operator<	(	const T *	b,
		const AutoNullPtr< T > &	a
	)			[inline]

template<class T>

bool operator<	(	const AutoNullPtr< T > &	a,
		const T *	b
	)			[inline]

template<class T>

bool operator<=	(	const AutoNullPtr< T > &	a,
		const AutoNullPtr< T > &	b
	)			[inline]

template<class T>

bool operator<=	(	const T *	b,
		const AutoNullPtr< T > &	a
	)			[inline]

template<class T>

bool operator<=	(	const AutoNullPtr< T > &	a,
		const T *	b
	)			[inline]

template<class T>

bool operator==	(	const AutoNullPtr< T > &	a,
		const AutoNullPtr< T > &	b
	)			[inline]

References AutoNullPtr< T >::get().

template<class T>

bool operator==	(	const T *	b,
		const AutoNullPtr< T > &	a
	)			[inline]

References AutoNullPtr< T >::get().

template<class T>

bool operator==	(	const AutoNullPtr< T > &	a,
		const T *	b
	)			[inline]

References AutoNullPtr< T >::get().

template<class T>

bool operator>	(	const AutoNullPtr< T > &	a,
		const AutoNullPtr< T > &	b
	)			[inline]

References AutoNullPtr< T >::get().

template<class T>

bool operator>	(	const T *	b,
		const AutoNullPtr< T > &	a
	)			[inline]

References AutoNullPtr< T >::get().

template<class T>

bool operator>	(	const AutoNullPtr< T > &	a,
		const T *	b
	)			[inline]

References AutoNullPtr< T >::get().

template<class T>

bool operator>=	(	const AutoNullPtr< T > &	a,
		const AutoNullPtr< T > &	b
	)			[inline]

References AutoNullPtr< T >::get().

template<class T>

bool operator>=	(	const T *	b,
		const AutoNullPtr< T > &	a
	)			[inline]

References AutoNullPtr< T >::get().

template<class T>

bool operator>=	(	const AutoNullPtr< T > &	a,
		const T *	b
	)			[inline]

References AutoNullPtr< T >::get().