Recognizer for optional-integer-type-suffix structures.
(optional-integer-type-suffix-p x) → *
Function:
(defun optional-integer-type-suffix-p (x) (declare (xargs :guard t)) (let ((__function__ 'optional-integer-type-suffix-p)) (declare (ignorable __function__)) (and (consp x) (cond ((or (atom x) (eq (car x) :none)) (and (true-listp (cdr x)) (eql (len (cdr x)) 0) (b* nil t))) ((eq (car x) :lowercase) (and (true-listp (cdr x)) (eql (len (cdr x)) 0) (b* nil t))) (t (and (eq (car x) :uppercase) (and (true-listp (cdr x)) (eql (len (cdr x)) 0)) (b* nil t)))))))
Theorem:
(defthm consp-when-optional-integer-type-suffix-p (implies (optional-integer-type-suffix-p x) (consp x)) :rule-classes :compound-recognizer)