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• Parse-udps

Vl-parse-udp-initial-statement

udp_initial_statement ::= 'initial' output_port_identifier '=' init_val ';'

Signature

(vl-parse-udp-initial-statement regname &key (tokstream 'tokstream) 
                                (config 'config)) 
 
  → 
(mv errmsg? value new-tokstream)

Arguments

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

Requires that the ID matches the regname, which will be the name of the output port.

Definitions and Theorems

Function: vl-parse-udp-initial-statement-fn

(defun vl-parse-udp-initial-statement-fn (regname tokstream config)
 (declare (xargs :stobjs (tokstream)))
 (declare (xargs :guard (vl-loadconfig-p config)))
 (declare (ignorable config))
 (declare (xargs :guard (and (stringp regname)
                             (vl-is-token? :vl-kwd-initial))))
 (let ((__function__ 'vl-parse-udp-initial-statement))
  (declare (ignorable __function__))
  (seq
   tokstream (:= (vl-match))
   (id := (vl-match-token :vl-idtoken))
   (unless
    (equal (vl-idtoken->name id) regname)
    (return-raw
        (vl-parse-error
             "UDP initial statement must assign to its register.")))
   (:= (vl-match-token :vl-equalsign))
   (val := (vl-parse-udp-init-val))
   (:= (vl-match-token :vl-semi))
   (return val))))

Theorem: vl-parse-udp-initial-statement-fails-gracefully

(defthm vl-parse-udp-initial-statement-fails-gracefully
  (implies (mv-nth 0
                   (vl-parse-udp-initial-statement regname))
           (not (mv-nth 1
                        (vl-parse-udp-initial-statement regname)))))

Theorem: vl-warning-p-of-vl-parse-udp-initial-statement

(defthm vl-warning-p-of-vl-parse-udp-initial-statement
 (iff
    (vl-warning-p (mv-nth 0
                          (vl-parse-udp-initial-statement regname)))
    (mv-nth 0
            (vl-parse-udp-initial-statement regname))))

Theorem: vl-parse-udp-initial-statement-result

(defthm vl-parse-udp-initial-statement-result
 (implies
  (and (and (force (stringp regname))
            (force (vl-is-token? :vl-kwd-initial))))
  (equal
       (vl-expr-p (mv-nth 1
                          (vl-parse-udp-initial-statement regname)))
       (not (mv-nth 0
                    (vl-parse-udp-initial-statement regname))))))

Theorem: vl-parse-udp-initial-statement-count-strong

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