Recognizer for partys/declor/ambig structures.
(partys/declor/ambig-p x) → *
Function:
(defun partys/declor/ambig-p (x) (declare (xargs :guard t)) (let ((__function__ 'partys/declor/ambig-p)) (declare (ignorable __function__)) (and (consp x) (cond ((or (atom x) (eq (car x) :partys)) (and (true-listp (cdr x)) (eql (len (cdr x)) 0) (b* nil t))) ((eq (car x) :declor) (and (true-listp (cdr x)) (eql (len (cdr x)) 0) (b* nil t))) (t (and (eq (car x) :ambig) (and (true-listp (cdr x)) (eql (len (cdr x)) 0)) (b* nil t)))))))
Theorem:
(defthm consp-when-partys/declor/ambig-p (implies (partys/declor/ambig-p x) (consp x)) :rule-classes :compound-recognizer)