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Major-frame

Major-frame-p

Recognizer for major-frame structures.

Signature
(major-frame-p x) → *

Definitions and Theorems

Function: major-frame-p

(defun major-frame-p (x)
 (declare (xargs :guard t))
 (let ((__function__ 'major-frame-p))
  (declare (ignorable __function__))
  (and
   (mbe
       :logic (and (alistp x)
                   (equal (strip-cars x)
                          '(bindings rule phase minor-stack)))
       :exec
       (fty::alist-with-carsp x '(bindings rule phase minor-stack)))
   (b* ((bindings (cdr (std::da-nth 0 x)))
        (rule (cdr (std::da-nth 1 x)))
        (phase (cdr (std::da-nth 2 x)))
        (minor-stack (cdr (std::da-nth 3 x))))
     (and (fgl-object-bindings-p bindings)
          (maybe-fgl-generic-rule-p rule)
          (acl2::maybe-natp phase)
          (minor-stack-p minor-stack))))))

Theorem: consp-when-major-frame-p

(defthm consp-when-major-frame-p
  (implies (major-frame-p x) (consp x))
  :rule-classes :compound-recognizer)