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• Parse-property

Vl-parse-dist-item

Matches dist_item.

Signature

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

Arguments

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

See vl-distitem. Grammar rules:

dist_item ::= value_range [ dist_weight ]

dist_weight ::= ':=' expression
              | ':/' expression

value_range ::= expression
              | [ expression : expression ]

Definitions and Theorems

Function: vl-parse-dist-item-fn

(defun vl-parse-dist-item-fn (tokstream config)
 (declare (xargs :stobjs (tokstream)))
 (declare (xargs :guard (vl-loadconfig-p config)))
 (declare (ignorable config))
 (let ((__function__ 'vl-parse-dist-item))
  (declare (ignorable __function__))
  (seq
    tokstream
    (when (vl-is-token? :vl-lbrack)
          (lbrack := (vl-match)))
    (left := (vl-parse-expression))
    (when lbrack (:= (vl-match-token :vl-colon))
          (right := (vl-parse-expression))
          (:= (vl-match-token :vl-rbrack)))
    (when (vl-is-some-token? '(:vl-coloneq :vl-colonslash))
          (type := (vl-match))
          (weight := (vl-parse-expression)))
    (return
         (make-vl-distitem
              :left left
              :right right
              :type (cond ((not type) :vl-weight-each)
                          ((eq (vl-token->type type) :vl-coloneq)
                           :vl-weight-each)
                          ((eq (vl-token->type type)
                               :vl-colonslash)
                           :vl-weight-total)
                          (t (progn$ (impossible) :vl-weight-each)))
              :weight (or weight (vl-make-index 1)))))))

Theorem: vl-parse-dist-item-fails-gracefully

(defthm vl-parse-dist-item-fails-gracefully
  (implies (mv-nth 0 (vl-parse-dist-item))
           (not (mv-nth 1 (vl-parse-dist-item)))))

Theorem: vl-warning-p-of-vl-parse-dist-item

(defthm vl-warning-p-of-vl-parse-dist-item
  (iff (vl-warning-p (mv-nth 0 (vl-parse-dist-item)))
       (mv-nth 0 (vl-parse-dist-item))))

Theorem: vl-parse-dist-item-result

(defthm vl-parse-dist-item-result
  (implies (and t)
           (equal (vl-distitem-p (mv-nth 1 (vl-parse-dist-item)))
                  (not (mv-nth 0 (vl-parse-dist-item))))))

Theorem: vl-parse-dist-item-count-strong

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