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Register-type-kind

Get the kind (tag) of a register-type structure.

Signature
(register-type-kind x) → kind
Arguments: x — Guard (register-typep x).

Definitions and Theorems

Function: register-type-kind$inline

(defun register-type-kind$inline (x)
  (declare (xargs :guard (register-typep x)))
  (let ((__function__ 'register-type-kind))
    (declare (ignorable __function__))
    (mbe :logic (cond ((or (atom x) (eq (car x) :plaintext))
                       :plaintext)
                      ((eq (car x) :record) :record)
                      (t :extrecord))
         :exec (car x))))

Theorem: register-type-kind-possibilities

(defthm register-type-kind-possibilities
  (or (equal (register-type-kind x)
             :plaintext)
      (equal (register-type-kind x) :record)
      (equal (register-type-kind x)
             :extrecord))
  :rule-classes
  ((:forward-chaining :trigger-terms ((register-type-kind x)))))