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• Parse-udps

Vl-parse-level-symbol

level_symbol ::= '0' | '1' | 'x' | 'X' | '?' | 'b' | 'B'

Signature

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

Arguments

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

Definitions and Theorems

Function: vl-parse-level-symbol-fn

(defun vl-parse-level-symbol-fn (tokstream config)
 (declare (xargs :stobjs (tokstream)))
 (declare (xargs :guard (vl-loadconfig-p config)))
 (declare (ignorable config))
 (let ((__function__ 'vl-parse-level-symbol))
  (declare (ignorable __function__))
  (seq
   tokstream
   (unless
    (and (consp (vl-tokstream->tokens))
         (vl-udp-level-symbol-token-p (car (vl-tokstream->tokens))))
    (return-raw (vl-parse-error "Expected a UDP level symbol.")))
   (level := (vl-match))
   (return (vl-udp-level-symbol-token->interp level)))))

Theorem: vl-parse-level-symbol-fails-gracefully

(defthm vl-parse-level-symbol-fails-gracefully
  (implies (mv-nth 0 (vl-parse-level-symbol))
           (not (mv-nth 1 (vl-parse-level-symbol)))))

Theorem: vl-warning-p-of-vl-parse-level-symbol

(defthm vl-warning-p-of-vl-parse-level-symbol
  (iff (vl-warning-p (mv-nth 0 (vl-parse-level-symbol)))
       (mv-nth 0 (vl-parse-level-symbol))))

Theorem: vl-parse-level-symbol-result

(defthm vl-parse-level-symbol-result
 (implies (and t)
          (equal (vl-udpsymbol-p (mv-nth 1 (vl-parse-level-symbol)))
                 (not (mv-nth 0 (vl-parse-level-symbol))))))

Theorem: vl-parse-level-symbol-count-strong

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

Subtopics

Vl-udp-level-symbol-token->interp

Vl-udp-level-symbol-token-p