Re: Help with NSPointerArray and NSMapTable

On Sep 21, 2009, at 20:54, Nat! wrote:

> I would try NSPointerFunctionsOpaqueMemory (shouldn't retain/release  
> or do weird GC stuff on the value),
> + NSPointerFunctionsIntegerPersonality (use value as hash and  
> equality) and pass in the integer casted in as void *.
>
> If that's right, then I guess the documentation is sufficient ;)
>
> Ciao
>   Nat!

Thanks. The problem I have with the docs is that it is not obvious to  
me what the "value" is. Is this the pointer itself, or the target of  
the pointer? If it's the pointer, they should call it the pointer,  
otherwise they should explain which value they're talking about. For  
instance, if you are right, than for  
NSPointerFunctionsIntegerFunctionality the value is the pointer itself  
(which actually isn't a pointer), while for  
NSPointerFunctionsStructPersonality, the struct is the target of the  
pointer. Quite frankly, that distinction is not clear for me by  
reading the docs.

Apart from this, the 64-bit docs warn against type-casting an  
NSInteger as a pointer, but that seems to be exactly what  
NSPointerArray expects me to do? If they go against their own docs I  
really think they should be more clear.

Christiaan