Re: [Pyobjc-dev] In and out of NSData

[Ronald O. <ous...@ci...>]

On Wednesday, Jan 8, 2003, at 00:49 Europe/Amsterdam, Bob Ippolito 
wrote:
>
> Is there currently any way to do (pyobjc) NS* <-> (Carbon.CF) CF* for 
> the toll-free bridged types?  I don't see anything obvious from a 
> quick look.

Not yet, but adding these mappings would be quite easy.

Proposed interface:

	Foundation.pyobjc_NSToCF(NSObject) -> CFObject
	Foundation.pyobjc_CFToNS(CFObject) -> NSObject

Both raise ValueError if the argument cannot be mapped to the other 
representation.

These are uncontroversion, except maybe the location of the functions. 
When I first looked at doing this I intended to implement pyobjc_CFToNS 
as part of the generic bridge; that is, if the Objective-C code expects 
to receive an NSObject and the user passed in a CFObject automaticly 
translate between the two. I'm currently not sure whether that would be 
a good idea, stuffing a CFObject in a NS<Datastructure> and retrieving 
it again would effectivly change its type. This might be pretty 
confusing (especially because the translation from NSObject to CFObject 
won't be automatic).

I'm therefore inclined to making all mappings from CF to NS and back 
manual operations.

Opinions?

Ronald