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• Parser

Vl-maybe-parse-lifetime

Match an optional lifetime for SystemVerilog-2012.

Signature

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

Arguments

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

Grammar:

lifetime ::= 'static' | 'automatic'

Definitions and Theorems

Function: vl-maybe-parse-lifetime-fn

(defun vl-maybe-parse-lifetime-fn (tokstream config)
  (declare (xargs :stobjs (tokstream)))
  (declare (xargs :guard (vl-loadconfig-p config)))
  (declare (ignorable config))
  (let ((__function__ 'vl-maybe-parse-lifetime))
    (declare (ignorable __function__))
    (seq tokstream
         (when (vl-is-token? :vl-kwd-static)
               (:= (vl-match))
               (return :vl-static))
         (when (vl-is-token? :vl-kwd-automatic)
               (:= (vl-match))
               (return :vl-automatic))
         (return nil))))

Theorem: vl-maybe-parse-lifetime-fails-gracefully

(defthm vl-maybe-parse-lifetime-fails-gracefully
  (implies (mv-nth 0 (vl-maybe-parse-lifetime))
           (not (mv-nth 1 (vl-maybe-parse-lifetime)))))

Theorem: vl-warning-p-of-vl-maybe-parse-lifetime

(defthm vl-warning-p-of-vl-maybe-parse-lifetime
  (iff (vl-warning-p (mv-nth 0 (vl-maybe-parse-lifetime)))
       (mv-nth 0 (vl-maybe-parse-lifetime))))

Theorem: vl-maybe-parse-lifetime-result

(defthm vl-maybe-parse-lifetime-result
  (implies (and t)
           (vl-lifetime-p (mv-nth 1 (vl-maybe-parse-lifetime)))))

Theorem: vl-maybe-parse-lifetime-count-strong-on-value

(defthm vl-maybe-parse-lifetime-count-strong-on-value
 (and
   (<= (vl-tokstream-measure
            :tokstream (mv-nth 2 (vl-maybe-parse-lifetime)))
       (vl-tokstream-measure))
   (implies (mv-nth 1 (vl-maybe-parse-lifetime))
            (< (vl-tokstream-measure
                    :tokstream (mv-nth 2 (vl-maybe-parse-lifetime)))
               (vl-tokstream-measure))))
 :rule-classes ((:rewrite) (:linear)))