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Valid-scope

Valid-scopep

Recognizer for valid-scope structures.

Signature
(valid-scopep x) → *

Definitions and Theorems

Function: valid-scopep

(defun valid-scopep (x)
  (declare (xargs :guard t))
  (let ((__function__ 'valid-scopep))
    (declare (ignorable __function__))
    (and (mbe :logic (and (alistp x)
                          (equal (strip-cars x) '(ord)))
              :exec (fty::alist-with-carsp x '(ord)))
         (b* ((ord (cdr (std::da-nth 0 x))))
           (valid-ord-scopep ord)))))

Theorem: consp-when-valid-scopep

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