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• Parse-expressions

Vl-parse-optional-edge-identifier

Signature

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

Arguments

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

Definitions and Theorems

Function: vl-parse-optional-edge-identifier-fn

(defun vl-parse-optional-edge-identifier-fn (tokstream config)
  (declare (xargs :stobjs (tokstream)))
  (declare (xargs :guard (vl-loadconfig-p config)))
  (declare (ignorable config))
  (let ((__function__ 'vl-parse-optional-edge-identifier))
    (declare (ignorable __function__))
    (seq tokstream
         (when (vl-is-some-token?
                    '(:vl-kwd-posedge :vl-kwd-negedge :vl-kwd-edge))
               (edge := (vl-match)))
         (return (if (not edge)
                     :vl-noedge
                   (case (vl-token->type edge)
                         (:vl-kwd-posedge :vl-posedge)
                         (:vl-kwd-negedge :vl-negedge)
                         (:vl-kwd-edge :vl-edge)
                         (t (impossible))))))))

Theorem: vl-parse-optional-edge-identifier-never-fails

(defthm vl-parse-optional-edge-identifier-never-fails
  (not (mv-nth 0 (vl-parse-optional-edge-identifier))))

Theorem: vl-parse-optional-edge-identifier-result

(defthm vl-parse-optional-edge-identifier-result
 (implies
    (and (not (mv-nth 0 (vl-parse-optional-edge-identifier)))
         (and t))
    (vl-evatomtype-p (mv-nth 1
                             (vl-parse-optional-edge-identifier)))))

Theorem: vl-parse-optional-edge-identifier-count-weak

(defthm vl-parse-optional-edge-identifier-count-weak
 (<= (vl-tokstream-measure
          :tokstream (mv-nth 2 (vl-parse-optional-edge-identifier)))
     (vl-tokstream-measure))
 :rule-classes ((:rewrite) (:linear)))