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Denv

Denvp

Recognizer for denv structures.

Signature
(denvp x) → *

Definitions and Theorems

Function: denvp

(defun denvp (x)
 (declare (xargs :guard t))
 (let ((__function__ 'denvp))
  (declare (ignorable __function__))
  (and
     (consp x)
     (eq (car x) :denv)
     (mbe :logic
          (and (alistp (cdr x))
               (equal (strip-cars (cdr x))
                      '(call-stack functions structs screen curve)))
          :exec (fty::alist-with-carsp
                     (cdr x)
                     '(call-stack functions structs screen curve)))
     (b* ((call-stack (cdr (std::da-nth 0 (cdr x))))
          (functions (cdr (std::da-nth 1 (cdr x))))
          (structs (cdr (std::da-nth 2 (cdr x))))
          (screen (cdr (std::da-nth 3 (cdr x))))
          (curve (cdr (std::da-nth 4 (cdr x)))))
       (and (call-dinfo-listp call-stack)
            (function-denvp functions)
            (struct-denvp structs)
            (screenp screen)
            (curvep curve))))))

Theorem: consp-when-denvp

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