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Mark Hamburg wrote:
> On Oct 13, 2009, at 3:35 PM, TNHarris wrote:
> >    return something, F()
> >
> > ... isn't a tail-call. I thought it would be, but the comma operator  
> > is
> > enough to prevent the optimization. I think it would be a worthwhile
> > change to the VM to allow a tail-call in this case.
> This can't be a tail call because it has to process the results of F()  
> to combine them with something before returning further up the chain.

Note that even Scheme can't tail-call similar constructs