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• Parse-assignments

Vl-parse-net-assignment

Parse a net_assignment.

Signature

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

Arguments

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

Both Verilog-2005 and SystemVerilog-2012 agree on this rule:

net_assignment ::= net_lvalue '=' expression

Definitions and Theorems

Function: vl-parse-net-assignment-fn

(defun vl-parse-net-assignment-fn (tokstream config)
  (declare (xargs :stobjs (tokstream)))
  (declare (xargs :guard (vl-loadconfig-p config)))
  (declare (ignorable config))
  (let ((__function__ 'vl-parse-net-assignment))
    (declare (ignorable __function__))
    (seq tokstream
         (lvalue := (vl-parse-net-lvalue))
         (:= (vl-match-token :vl-equalsign))
         (expr := (vl-parse-expression))
         (return (cons lvalue expr)))))

Theorem: vl-parse-net-assignment-fails-gracefully

(defthm vl-parse-net-assignment-fails-gracefully
  (implies (mv-nth 0 (vl-parse-net-assignment))
           (not (mv-nth 1 (vl-parse-net-assignment)))))

Theorem: vl-warning-p-of-vl-parse-net-assignment

(defthm vl-warning-p-of-vl-parse-net-assignment
  (iff (vl-warning-p (mv-nth 0 (vl-parse-net-assignment)))
       (mv-nth 0 (vl-parse-net-assignment))))

Theorem: vl-parse-net-assignment-result

(defthm vl-parse-net-assignment-result
 (implies
      (and (not (mv-nth 0 (vl-parse-net-assignment)))
           (and t))
      (and (consp (mv-nth 1 (vl-parse-net-assignment)))
           (vl-expr-p (car (mv-nth 1 (vl-parse-net-assignment))))
           (vl-expr-p (cdr (mv-nth 1 (vl-parse-net-assignment)))))))

Theorem: vl-parse-net-assignment-count-strong

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