Re: [aspectj-dev] if (false) pointcut and the empty set

[Jim Hugunin <lists@xxxxxxxxxxx>]

AspectJ has a mechanism for specifying that a pointcut matches nothing. 
 You specify no body at all, i.e.
   pointcut pc();

There have been complaints that this is confusing to people because it 
looks too much like an abstract pointcut declaration.  For 1.2, we will 
consider providing a guarantee that if(false) will always be optimized 
away as matching nothing; however, I'm always concerned about having two 
roughly equivalent ways of saying the same thing in a programming language.

-Jim


Dean Wampler wrote:
> I don't understand the internals of ajc, but the error messages also 
> indicate to me that "if (false)" still results in some sort of 
> evaluation at all join points and hence it still imposes a lot of 
> overhead during the build. True? If so, a way to really turn it off 
> "completely" would be nice (or some sort of alternative mechanism  ....)
>
> dean
>
> Macneil Shonle wrote:
>
> > Hi all,
> >
> > This is a minor feature request, but something I'd like to see. Sometimes
> > I want to disable a pointcut in my development (essentially commenting it
> > out). I used to do this by making the pointcut be "if (false)" but this
> > creates errors for after advice when expection handlers are present:
> >
> > <...>
> > Thanks,
> > Macneil