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