hey, that's pretty clever.

Chris Huff wrote:
> 
> In article <chrishuff-AF5968.09493830082000@news.povray.org>, Chris
> Huff <chr### [at] maccom> wrote:
> 
> > Well, I guess I was wrong!
> > BTW, I think I just figured out how to implement it, just have to
> > compile and test it...
> 
> I just finished implementing the #set keyword. It works perfectly: it
> modifies the most recently created version of a variable, but if given a
> variable that doesn't yet exist, it produces an error. It works properly
> with local variables, modifying the "most local" one.
> 
> Basically, instead of:
> #declare J=0;
> #while(J<10)
>     #declare J=J+1;
> #end
> 
> you would use:
> #declare J=0;
> #while(J<10)
>     #set J=J+1;
> #end
> 
> One place this is useful is if you make a typing mistake, like this:
> #declare MyCounter=0;
> #while(MyCounter<10)
>     #declare MyCountr = MyCounter+1;
> #end
> This would normally cause an infinite loop, and may take a while to
> track down, especially in complex scenes and with typos that "look
> right" at a glance. If #set was used, it would cause an error ("#set
> cannot assign to uninitialized identifier MyCountr.") at that line,
> pointing you directly at the problem.
> 
> Another thing is that it makes it more visually clear where variables
> are *created*, and where they are only *changed*.
> And it is less typing. ;-)
> 
> I will post the code for this patch in these newsgroups soon.
> 
> --
> Christopher James Huff
> Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
> TAG: chr### [at] tagpovrayorg, http://tag.povray.org/
> 
> <><

Post a reply to this message