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• Sv-ansi-port-interpretation

Vl-port-starts-ansi-port-list-p

Determine whether we're in an ANSI or non-ANSI port list.

Signature

(vl-port-starts-ansi-port-list-p port1) → ansi-p

Arguments

port1 — Guard (vl-parsed-ansi-port-p port1).

Returns

ansi-p — Type (booleanp ansi-p).

To tell which version we are in, we follow the rule suggested in 23.2.2.3 (pg 667):

For the first port in the port list: if the direction, port kind, and data type are all omitted, then the port shall be assumed to be a member of a non-ANSI style list_of_ports...

Definitions and Theorems

Function: vl-port-starts-ansi-port-list-p

(defun vl-port-starts-ansi-port-list-p (port1)
 (declare (xargs :guard (vl-parsed-ansi-port-p port1)))
 (let ((__function__ 'vl-port-starts-ansi-port-list-p))
  (declare (ignorable __function__))
  (b* (((vl-parsed-ansi-port port1))
       ((when port1.dir) t))
   (case (tag port1.head)
         (:vl-parsed-interface-head t)
         (:vl-parsed-portdecl-head
              (b* (((vl-parsed-portdecl-head port1.head))
                   ((when (or port1.head.nettype
                              port1.head.var-p port1.head.explicit-p
                              port1.head.implicit-p))
                    t))
                nil))
         (otherwise (impossible))))))

Theorem: booleanp-of-vl-port-starts-ansi-port-list-p

(defthm booleanp-of-vl-port-starts-ansi-port-list-p
  (b* ((ansi-p (vl-port-starts-ansi-port-list-p port1)))
    (booleanp ansi-p))
  :rule-classes :type-prescription)