[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: pointer to structures

"Liam E.Gumley" wrote:
> "J.D. Smith" wrote:
> > With time, you will get used to these semantics.  They seem arcane, but
> > eventually it becomes somewhat readable to the experienced eye.  Of course, I've
> > struggled with statements like:
> >
> >  HEADER=*(*(*self.DR)[sel[i]].HEADER)
> I neglected to provide an example of why simplified pointer and
> structure referencing is desirable. Thanks for the help JD!
> ;-)
> Cheers,
> Liam.

But then you have to ask yourself which is worse, the confusing string above, or
the explicit:


repeat this about 5000 times throughout your application, and you begin to
appreciate the terse form above.  Especially if you're passing some part of the
nested data to a routine by reference... intermediate variables require you to
remember to assign them after use (everybody remember

Maybe we need a lexical parser like cdecl, to check on these for you?  A fine
programming project for an aspiring IDL programmer out there.  


 J.D. Smith                             |*|      WORK: (607) 255-5842    
 Cornell University Dept. of Astronomy  |*|            (607) 255-6263
 304 Space Sciences Bldg.               |*|       FAX: (607) 255-5875 
 Ithaca, NY 14853                       |*|