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Pristate

Pristatep

Recognizer for pristate structures.

Signature
(pristatep x) → *

Definitions and Theorems

Function: pristatep

(defun pristatep (x)
 (declare (xargs :guard t))
 (let ((__function__ 'pristatep))
  (declare (ignorable __function__))
  (and
   (mbe :logic (and (alistp x)
                    (equal (strip-cars x)
                           '(bytes-rev indent-level options)))
        :exec
        (fty::alist-with-carsp x '(bytes-rev indent-level options)))
   (b* ((bytes-rev (cdr (std::da-nth 0 x)))
        (indent-level (cdr (std::da-nth 1 x)))
        (options (cdr (std::da-nth 2 x))))
     (and (byte-listp bytes-rev)
          (natp indent-level)
          (prioptp options))))))

Theorem: consp-when-pristatep

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