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Block

Blockp

Recognizer for block structures.

Signature
(blockp x) → *

Definitions and Theorems

Function: blockp

(defun blockp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'blockp))
    (declare (ignorable __function__))
    (and (mbe :logic (and (alistp x)
                          (equal (strip-cars x)
                                 '(transactions round)))
              :exec (fty::alist-with-carsp x '(transactions round)))
         (b* ((transactions (cdr (std::da-nth 0 x)))
              (round (cdr (std::da-nth 1 x))))
           (and (transaction-listp transactions)
                (posp round)
                (evenp round))))))

Theorem: consp-when-blockp

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