Re: pointers in objective-c?

FROM : Clark S. Cox III
DATE : Fri Aug 01 21:24:10 2008

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>