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• Parse-clocking

Vl-parse-default-skew-item

Match 'default' default_skew ';' .

Signature

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

Arguments

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

SystemVerilog-2012 Grammar:

default_skew ::=
   'input' clocking_skew
 | 'output' clocking_skew
 | 'input' clocking_skew 'output' clocking_skew

Definitions and Theorems

Function: vl-parse-default-skew-item-fn

(defun vl-parse-default-skew-item-fn (tokstream config)
 (declare (xargs :stobjs (tokstream)))
 (declare (xargs :guard (vl-loadconfig-p config)))
 (declare (ignorable config))
 (let ((__function__ 'vl-parse-default-skew-item))
  (declare (ignorable __function__))
  (seq tokstream
       (:= (vl-match-token :vl-kwd-default))
       (when (vl-is-token? :vl-kwd-output)
             (:= (vl-match))
             (oskew := (vl-parse-clocking-skew))
             (:= (vl-match-token :vl-semi))
             (return (list (make-vl-defaultskew-item :inputp nil
                                                     :skew oskew))))
       (:= (vl-match-token :vl-kwd-input))
       (iskew := (vl-parse-clocking-skew))
       (when (vl-is-token? :vl-semi)
             (:= (vl-match))
             (return (list (make-vl-defaultskew-item :inputp t
                                                     :skew iskew))))
       (:= (vl-match-token :vl-kwd-output))
       (oskew := (vl-parse-clocking-skew))
       (:= (vl-match-token :vl-semi))
       (return (list (make-vl-defaultskew-item :inputp t
                                               :skew iskew)
                     (make-vl-defaultskew-item :inputp nil
                                               :skew oskew))))))

Theorem: vl-parse-default-skew-item-fails-gracefully

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

Theorem: vl-warning-p-of-vl-parse-default-skew-item

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

Theorem: vl-parse-default-skew-item-result

(defthm vl-parse-default-skew-item-result
  (implies (and t)
           (vl-clocking-block-item-list-p
                (mv-nth 1 (vl-parse-default-skew-item)))))

Theorem: vl-parse-default-skew-item-true-listp

(defthm vl-parse-default-skew-item-true-listp
  (true-listp (mv-nth 1 (vl-parse-default-skew-item)))
  :rule-classes :type-prescription)

Theorem: vl-parse-default-skew-item-count-strong

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