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Regaccess

Regaccessp

Recognizer for regaccess structures.

Signature
(regaccessp x) → *

Definitions and Theorems

Function: regaccessp

(defun regaccessp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'regaccessp))
    (declare (ignorable __function__))
    (and (consp x)
         (eq (car x) :regaccess)
         (mbe :logic (and (alistp (cdr x))
                          (equal (strip-cars (cdr x))
                                 '(base comps)))
              :exec (fty::alist-with-carsp (cdr x)
                                           '(base comps)))
         (b* ((base (cdr (std::da-nth 0 (cdr x))))
              (comps (cdr (std::da-nth 1 (cdr x)))))
           (and (registerp base)
                (identifier-listp comps))))))

Theorem: consp-when-regaccessp

(defthm consp-when-regaccessp
  (implies (regaccessp x) (consp x))
  :rule-classes :compound-recognizer)