Get the kind (tag) of a designor structure.
(designor-kind x) → kind
Function:
(defun designor-kind$inline (x) (declare (xargs :guard (designorp x))) (let ((__function__ 'designor-kind)) (declare (ignorable __function__)) (mbe :logic (cond ((eq (car x) :sub) :sub) (t :dot)) :exec (car x))))
Theorem:
(defthm designor-kind-possibilities (or (equal (designor-kind x) :sub) (equal (designor-kind x) :dot)) :rule-classes ((:forward-chaining :trigger-terms ((designor-kind x)))))