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Vl-string-values-p

Recognizer for alists whose values are strings.

Definitions and Theorems

Function: vl-string-values-p

(defun vl-string-values-p (x)
  (declare (xargs :guard t))
  (if (consp x)
      (and (consp (car x))
           (stringp (cdar x))
           (vl-string-values-p (cdr x)))
    (not x)))

Theorem: vl-string-values-p-when-not-consp

(defthm vl-string-values-p-when-not-consp
  (implies (not (consp x))
           (equal (vl-string-values-p x) (not x))))

Theorem: vl-string-values-p-of-cons

(defthm vl-string-values-p-of-cons
  (equal (vl-string-values-p (cons a x))
         (and (consp a)
              (stringp (cdr a))
              (vl-string-values-p x))))

Theorem: vl-string-values-p-of-hons-shrink-alist

(defthm vl-string-values-p-of-hons-shrink-alist
  (implies (and (vl-string-values-p x)
                (vl-string-values-p ans))
           (vl-string-values-p (hons-shrink-alist x ans))))

Theorem: stringp-of-cdr-of-hons-assoc-equal-when-vl-string-values-p

(defthm stringp-of-cdr-of-hons-assoc-equal-when-vl-string-values-p
  (implies (vl-string-values-p x)
           (equal (stringp (cdr (hons-assoc-equal a x)))
                  (if (hons-assoc-equal a x) t nil))))