Table lookups - this is pretty definitive

[bearophile]

Walter Bright:

>> D can't give an error in that case because it's a big breaking 
>> change. So is D in that case just
>> silently not performing the tail call as the programmer meant?
>
> That's right.

Then this feature needs a specific and explicit syntax, or it has 
_no_ point at all.
(Note: I am currently not asking for this feature in D. I have 
just shown one of its minimal requirements).

Bye,
bearophile