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Address+pos

Address+posp

Recognizer for address+pos structures.

Signature
(address+posp x) → *

Definitions and Theorems

Function: address+posp

(defun address+posp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'address+posp))
    (declare (ignorable __function__))
    (and (mbe :logic (and (alistp x)
                          (equal (strip-cars x) '(address pos)))
              :exec (fty::alist-with-carsp x '(address pos)))
         (b* ((address (cdr (std::da-nth 0 x)))
              (pos (cdr (std::da-nth 1 x))))
           (and (addressp address) (posp pos))))))

Theorem: consp-when-address+posp

(defthm consp-when-address+posp
  (implies (address+posp x) (consp x))
  :rule-classes :compound-recognizer)