Re: mutableCopy in NSArray

[Richard Frith-Macdonald]

On Monday, March 18, 2002, at 09:03 PM, Jonathan B. Leffert wrote:

> On Mon, Mar 18, 2002 at 09:25:48PM +0100, Thorano wrote:
>
> > ok, I understand the spirit.  But in this case [NSMutableArray 
> > copyWithZone]
> > is wrong :
> >
> > - (id) copyWithZone: (NSZone*)zone
> > {
> >   /* a deep copy */
> >   unsigned      count = [self count];
> >   id            objects[count];
> >   NSArray       *newArray;
> >   unsigned      i;
> >
> >   [self getObjects: objects];
> >   for (i = 0; i < count; i++)
> >     objects[i] = [objects[i] copyWithZone: zone];
> >   newArray = [[GSArrayClass allocWithZone: zone]
> >     initWithObjects: objects count: count];
> >   while (i > 0)
> >     RELEASE(objects[--i]);
> >   return newArray;
> > }
> >
> > unless there is a something else I don't understand.
>
> Now I'm confused.
>
> How can one declare
>
>         id objects[count]
> ??
>
> count isn't resolvable at compile-time so won't the compiler complain?

No, that's a rather nice gcc extension.