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• Address

Address-p

Recognizer for address structures.

Signature

(address-p x) → *

Definitions and Theorems

Function: address-p

(defun address-p (x)
  (declare (xargs :guard t))
  (let ((__function__ 'address-p))
    (declare (ignorable __function__))
    (and (b* (((when (or (atom x)
                         (not (eq (car x) :address))))
               (path-p x)))
           (and (eq (car x) :address)
                (true-listp x)
                (eql (len x) 4)
                (not (and (eq (nth 2 x) nil)
                          (equal (nth 3 x) 0)))))
         (b* ((path (if (or (atom x)
                            (not (eq (car x) :address)))
                        x
                      (nth 1 x)))
              (index (if (or (atom x)
                             (not (eq (car x) :address)))
                         nil
                       (nth 2 x)))
              (scope (if (or (atom x)
                             (not (eq (car x) :address)))
                         0
                       (nth 3 x))))
           (and (path-p path)
                (maybe-natp index)
                (addr-scope-p scope))))))