Re: The poor state of documentation of pcase like things.

[David Kastrup]

John Wiegley <address@hidden> writes:

>>>>>> Eli Zaretskii <address@hidden> writes:
>
>>      (pcase skip
>>        (`nil nil)
>>        (`0 t)
>>        (_ (setq i (+ i skip -1)) (funcall get-next-frame)))))))
>
> (cond ((null skip))
>       ((eq skip 0) t)
>       (t (setq i (+ i skip -1)) 
>          (funcall get-next-frame)))
>
> Not much difference.

If skip is nil, the first returns probably nil and the second t.  One
could probably do

(and skip
     (or (eql skip 0)
         (setq ...)))

I'm not fond of eq for numeric comparisons: that's an Elispism.

-- 
David Kastrup