Const Pointer and References Table

Interesting table courtesy of my colleague Simon Locke about different possibilities of using const along with pointers and references.

Definition	Read-only	Ownership passed	Allows NULL
Type&	No	No	No
const Type&	Yes	No	No
Type*	No	Yes	Yes
const Type*	Yes	Yes	Yes
Type* const	No	No	Yes
const Type* const	Yes	No	Yes

The definition field is the parameter being passed to a function or a return from the function. For example you can see an example here of the first definition of 'Type&'.