I am a little surprised by sizeof(ID) being 4. What is sizeof(void*)?

My reading of, say,

http://developer.apple.com/documentation/MacOSX/Conceptual/OSX_Technology_Overview/PortingTips/chapter_9_section_2.html

is that it should be 8, but then that would mean that usual Cocoa casts like

id anID = ...

NSString* aString = (NSString*) anID;

would be suss.

Please don't make me buy a MacBook in the next week!

And thanks for the 2 of you making progress on this.

D

On 20 Sep 2008, at 01:03, Paul Loy wrote:

It may be too late, but I'm now a little confused. In 64-bits we have:

sizeof(ID) = 4 sizeof(SEL) = 8 sizeof(Class) = 8 sizeof(CFTypeRef) = 8

on 32-bit we have:

sizeof(ID) = 4 sizeof(SEL) = 4 sizeof(Class) = 4 sizeof(CFTypeRef) = 4

So I guess ID doesn't want to be a NativeLong? And then classes should not be IDs?

I need to sleep on this and then look at it again. (oh the CFTypeRef is the return type of CFRetain, we're currently invoking void on that one, when it does in fact have a return value of whatever you sent to CFRetain)

Much to ponder,

good night all

On Fri, Sep 19, 2008 at 11:45 PM, Matt Reynolds <ma...@hom3.us> wrote: