On Feb 23, 2011, at 2:35 PM, James Bucanek wrote:
> It also occurred to me that if I'm careful, the Objective-C code doesn't
> really need any of the details of the instance variables in the Objective-C++
> class:
>
> @interface MyCPPClass : NSObject
> {
> #ifdef __cplusplus
> @private
> SomeCPPClass *someCppObject;
> #endif
> }
> - (void)doSomething;
> @end
Not a good idea. In the 32-bit runtime, this might cause problems with
subclassing due to the fragile base class problem. And if you are able to
require the 64-bit runtime, then, as Sean pointed out, you don’t have to
include instance variables in the header at all. Either way, there’s no reason
to #ifdef out instance variables, unless you put a generic void pointer in an
#else block to keep the size the same.
Charles_______________________________________________
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