Hello,

the listp function doesn't apply the full "list" rules.

Example

(cons 1 ( cons 2 3 ))

Isn't a list as the definition goes:

* either an empty list (nil)
* or a cons cell that has a list for a cdr

altough listp yelds true to that "list"

So I'm writing a function that will do the full thing


This is correct for the following examples

(cons 1 ( cons 2 ( cons 3 ( cons 4 5 ))))
returns nil
(cons 1 (cons 2 3))
returns nul
(cons 1 ( cons 2 ( cons 3 ( cons 4 nil ))))
returns t
(1 2)
returns t

It seams ok. Is it?

Thamls.