Re: Check whether an object is an alist

[Stephen Berman <stephen.berman@gmx.net>]

On Tue, 17 Sep 2024 21:02:03 +0000 Heime <heimeborgia@protonmail.com> wrote:

[...]
> After changing to the following, I am getting validation for list 
> element (1 2 3), even though it is not an association. 

It is according to (info "(elisp) Association Lists"):

     Both the values and the keys in an alist may be any Lisp objects.
  For example, in the following alist, the symbol ‘a’ is associated with
  the number ‘1’, and the string ‘"b"’ is associated with the _list_ ‘(2
  3)’, which is the CDR of the alist element:
  
       ((a . 1) ("b" 2 3))

> (defun torium-alist-p (obj)
>   "Return t if object OBJ is an association list (alist)."
>     (and (listp obj)
>          (cl-every (lambda (x) #'consp) obj)))

Steve Berman