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Hex-string-rest-element

Hex-string-rest-elementp

Recognizer for hex-string-rest-element structures.

Signature
(hex-string-rest-elementp x) → *

Definitions and Theorems

Function: hex-string-rest-elementp

(defun hex-string-rest-elementp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'hex-string-rest-elementp))
    (declare (ignorable __function__))
    (and (consp x)
         (eq (car x) :hex-string-rest-element)
         (mbe :logic (and (alistp (cdr x))
                          (equal (strip-cars (cdr x))
                                 '(uscorep pair)))
              :exec (fty::alist-with-carsp (cdr x)
                                           '(uscorep pair)))
         (b* ((uscorep (cdr (std::da-nth 0 (cdr x))))
              (pair (cdr (std::da-nth 1 (cdr x)))))
           (and (booleanp uscorep)
                (hex-pairp pair))))))

Theorem: consp-when-hex-string-rest-elementp

(defthm consp-when-hex-string-rest-elementp
  (implies (hex-string-rest-elementp x)
           (consp x))
  :rule-classes :compound-recognizer)