Re: a question using performv

[Adam Fedor]

]d wrote:

> outputs
>
> I am wondering if the usage of
>                target performv:_cmd :__builtin_apply_args()];


The gcc __builtin functions are not really portable (they are 
essentially broken on non-ix86 machines), but they should work for 
simple cases, at least.

I'm not sure why you want to implement a class that could act as it's 
own delegate, but I might suggest an alternate implementation with an 
'Invocation' class (like GNUstep's NSInvocation) with a target set to 
'MyClass' which actually does the work. Then in Invocation, you can just 
implement forward::

- (retval_t) forward:(SEL)aSel :(arglist_t)argFrame
{
 if (target)

    return [target performv: aSel : argFrame];
}

int main()
{
  MyClass *x1 = [[[Myclass alloc] init]setIden:1];
  Invcation *invoke = [[Invocation alloc] initWithTarget: x1];
  [invoke printnumber:123 :456];
}

The internal functionality of forward:: still uses the __builtin 
functions, though.

--
Adam Fedor, Digital Optics Corp.      | I'm glad I hate spinach, because
http://www.doc.com                    | if I didn't, I'd eat it, and you
                                      | know how I hate the stuff.