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Vl-define-formal

Vl-define-formal-p

Recognizer for vl-define-formal structures.

Signature
(vl-define-formal-p x) → *

Definitions and Theorems

Function: vl-define-formal-p

(defun vl-define-formal-p (x)
  (declare (xargs :guard t))
  (let ((__function__ 'vl-define-formal-p))
    (declare (ignorable __function__))
    (and (mbe :logic (and (alistp x)
                          (equal (strip-cars x) '(name default)))
              :exec (fty::alist-with-carsp x '(name default)))
         (b* ((name (cdr (std::da-nth 0 x)))
              (default (cdr (std::da-nth 1 x))))
           (and (stringp name)
                (maybe-stringp default))))))

Theorem: consp-when-vl-define-formal-p

(defthm consp-when-vl-define-formal-p
  (implies (vl-define-formal-p x)
           (consp x))
  :rule-classes :compound-recognizer)