(vl-parse-optional-port-direction &key (tokstream 'tokstream) (config 'config)) → (mv errmsg? value new-tokstream)
Function:
(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:
(defthm vl-parse-optional-port-direction-never-fails (not (mv-nth 0 (vl-parse-optional-port-direction))))
Theorem:
(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:
(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)))