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• Sv-ansi-portdecls

Vl-parse-optional-port-direction

Signature

(vl-parse-optional-port-direction &key (tokstream 'tokstream) 
                                  (config 'config)) 
 
  → 
(mv errmsg? value new-tokstream)

Arguments

config — Guard (vl-loadconfig-p config).

Definitions and Theorems

Function: vl-parse-optional-port-direction-fn

(defun vl-parse-optional-port-direction-fn (tokstream config)
  (declare (xargs :stobjs (tokstream)))
  (declare (xargs :guard (vl-loadconfig-p config)))
  (declare (ignorable config))
  (let ((__function__ 'vl-parse-optional-port-direction))
    (declare (ignorable __function__))
    (seq tokstream
         (when (vl-is-some-token? *vl-directions-kwds*)
               (tok := (vl-match))
               (return (cdr (assoc (vl-token->type tok)
                                   *vl-directions-kwd-alist*))))
         (return nil))))

Theorem: vl-parse-optional-port-direction-never-fails

(defthm vl-parse-optional-port-direction-never-fails
  (not (mv-nth 0 (vl-parse-optional-port-direction))))

Theorem: vl-parse-optional-port-direction-result

(defthm vl-parse-optional-port-direction-result
  (implies (and (not (mv-nth 0 (vl-parse-optional-port-direction)))
                (and t))
           (vl-maybe-direction-p
                (mv-nth 1 (vl-parse-optional-port-direction)))))

Theorem: vl-parse-optional-port-direction-count-strong-on-value

(defthm vl-parse-optional-port-direction-count-strong-on-value
 (and
  (<= (vl-tokstream-measure
           :tokstream (mv-nth 2 (vl-parse-optional-port-direction)))
      (vl-tokstream-measure))
  (implies
   (mv-nth 1 (vl-parse-optional-port-direction))
   (< (vl-tokstream-measure
           :tokstream (mv-nth 2 (vl-parse-optional-port-direction)))
      (vl-tokstream-measure))))
 :rule-classes ((:rewrite) (:linear)))