Re: Negative nth index

[Stefan Monnier]

>> [ I'd make it return 2 otherwise you can't use it to return the
>>   last element.  ]
> I think the OP meant that (nth -1 '(1 2)) is 1 on current Emacs, which
> is definitely unexpected.

Ah.. you're right that makes a lot more sense.

>> I don't see a strong argument in favor of making it index from the end
>> rather than signal an error.  What would the implementation look like?
> I agree, but the current implementation does not signal an error.  It
> should, and I think that's what the suggestion was.

Sorry for misreading.  I'd prefer that we signal an error, yes.
Not sure it's worth the risk of breaking existing code, OTOH.


        Stefan