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• Verilog-2005-ports

Vl-parse-port-reference

Matches port_reference.

Signature

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

Arguments

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

Note: We assume that if a bracket follows the identifier, it belongs to this port reference. This is safe in port-expressions since only a comma or end curly-brace will follow them. Since port_reference never occurs anywhere else in the grammar, this should be fine everywhere.

Definitions and Theorems

Function: vl-parse-port-reference-fn

(defun vl-parse-port-reference-fn (tokstream config)
 (declare (xargs :stobjs (tokstream)))
 (declare (xargs :guard (vl-loadconfig-p config)))
 (declare (ignorable config))
 (let ((__function__ 'vl-parse-port-reference))
  (declare (ignorable __function__))
  (seq
   tokstream
   (id := (vl-match-token :vl-idtoken))
   (unless
    (vl-is-token? :vl-lbrack)
    (return
     (make-vl-atom :guts (make-vl-id :name (vl-idtoken->name id)))))
   (:= (vl-match))
   (range := (vl-parse-range-expression))
   (unless
    (or (eq (vl-erange->type range) :vl-index)
        (eq (vl-erange->type range) :vl-colon))
    (return-raw
     (vl-parse-error
      "The +: or -: operators are not allowed in port expressions.")))
   (:= (vl-match-token :vl-rbrack))
   (return
    (vl-build-range-select
       (make-vl-atom :guts (make-vl-id :name (vl-idtoken->name id)))
       range)))))

Theorem: vl-parse-port-reference-fails-gracefully

(defthm vl-parse-port-reference-fails-gracefully
  (implies (mv-nth 0 (vl-parse-port-reference))
           (not (mv-nth 1 (vl-parse-port-reference)))))

Theorem: vl-warning-p-of-vl-parse-port-reference

(defthm vl-warning-p-of-vl-parse-port-reference
  (iff (vl-warning-p (mv-nth 0 (vl-parse-port-reference)))
       (mv-nth 0 (vl-parse-port-reference))))

Theorem: vl-parse-port-reference-result

(defthm vl-parse-port-reference-result
  (implies (and t)
           (equal (vl-expr-p (mv-nth 1 (vl-parse-port-reference)))
                  (not (mv-nth 0 (vl-parse-port-reference))))))

Theorem: vl-parse-port-reference-count-strong

(defthm vl-parse-port-reference-count-strong
 (and
   (<= (vl-tokstream-measure
            :tokstream (mv-nth 2 (vl-parse-port-reference)))
       (vl-tokstream-measure))
   (implies (not (mv-nth 0 (vl-parse-port-reference)))
            (< (vl-tokstream-measure
                    :tokstream (mv-nth 2 (vl-parse-port-reference)))
               (vl-tokstream-measure))))
 :rule-classes ((:rewrite) (:linear)))