Re: Sharing variables and inline functions

[Axel von Kamp]

Fabio Mascelloni wrote:

> Axel von Kamp wrote:
>
> > I've also been thinking about how to efficiently gain read access to 
> > instance
> > variables without declaring them as @public. My idea (inspired by what
> > C++ does) is that, since in Objective C you can still use functions and gcc
> > supports inline functions (which is not ANSI standard), to use inline
> > functions for access. I have edited the example below to illustrate what I'm
> > talking about
> >
> >
> > inline int getShared (ModelSwarm *this);
> >
> >
> >
> > inline int getShared (ModelSwarm *this)
> > {
> >     return this-> shared;

corrected

>
> > }
> >
> >
> > int myInt;
> > myInt= getShared (modelSwarm);
> >
>
> That's right when you want to get a variable that's not a pointer.If  "shared"
> was a a pointer, the method would return a reference
> to a protected variable,would't it?

Well, yes, it would return the pointer. But the pointer doesn't neccessarily 
have to
point to a protected variable.

>  >
> > This should (?; I'm no compiler expert, so anybody with more technical
> > knowledge please comment on this) be as efficient as using a @public 
> > instance
> > variable without the drawback that @public instance variables can also be
> > written to.
>
> > (Furthermore, @public instance variables are not considered to begood style 
> > in
> > OO languages.)
>
> I don'care much about style when I've only two months to learn 
> Objective-C,Swarm
> and make a complex simulation  ;-)
>
> What about implementing a separate generic Objective-C class "CommonClass"  
> whose
> interface contains all the public members?

That's what I'm actually using to store the parameters for my simulation. It is 
very
convenient because I don't need to write a function/message for each parameter 
but
can use the -> operator as you suggest below.

>
> The values of these members would be set by the CommonClass instance through
> methods defined in the class,and they would be read directly by each other
> Swarm-object accessing them with the -->  operator.

-Axel



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