Re: pointers in objective-c?

FROM : Arthur Coleman
DATE : Fri Aug 01 21:38:29 2008

I hate to be dense, but what about C structs like NSRect?  There are 
initialized on the stack aren't they?

Arthur

On Aug 1, 2008, at 12:24 PM, Clark S. Cox III wrote:

>
> On Aug 1, 2008, at 12:10 PM, Glenn English wrote:
>

>> Wayne Shao wrote:

>>> It seems that every object is a pointer in the sample code I have
>>> seen.  Is there any distinction between an object and its pointer?
>>> In C++,  C* c; would be an uninitialized pointer. But the following
>>> line will creates an object with the constructor C().
>>> C c;
>>> It seems that there is no such equivalent syntax in Objective-C.
>>> objects are created either from factory pattern or  [[A alloc]
>>> someInitMethod ....];
>>> so, is it possible to write?
>>> NSString a;
>>> NSNumber b;

>>
>> Sure. And it'll even compile. But you'd better not try to do much 
>> with them:-)

>
> No, it won't compile:
>
> [<email_removed>:~]% cat test.m
> #import <Cocoa/Cocoa.h>
>
> int main()
> {
> NSString s;
>
> return 0;
> }
> [<email_removed>:~]% cc test.m
> test.m: In function ‘main’:
> test.m:5: error: statically allocated instance of Objective-C class 
> ‘NSString’
>
>
>
> --
> Clark S. Cox III
> <email_removed>
>
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