		Search-engine friendly clone of the ACL2 documentation.

Closure-output

Closure-outputp

Recognizer for closure-output structures.

Signature
(closure-outputp x) → *

Definitions and Theorems

Function: closure-outputp

(defun closure-outputp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'closure-outputp))
    (declare (ignorable __function__))
    (and (consp x)
         (eq (car x) :closure-output)
         (mbe :logic (and (alistp (cdr x))
                          (equal (strip-cars (cdr x))
                                 '(reg type)))
              :exec (fty::alist-with-carsp (cdr x)
                                           '(reg type)))
         (b* ((reg (cdr (std::da-nth 0 (cdr x))))
              (type (cdr (std::da-nth 1 (cdr x)))))
           (and (regaccessp reg)
                (register-typep type))))))

Theorem: consp-when-closure-outputp

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