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• Parse-utils

Vl-tokstream-restore

Signature

(vl-tokstream-restore backup &key (tokstream 'tokstream)) 
  → 
tokstream

Arguments

backup — Guard (vl-tokstream-backup-p backup).

Definitions and Theorems

Function: vl-tokstream-restore-fn

(defun vl-tokstream-restore-fn (backup tokstream)
  (declare (xargs :stobjs (tokstream)))
  (declare (xargs :guard (vl-tokstream-backup-p backup)))
  (let ((__function__ 'vl-tokstream-restore))
    (declare (ignorable __function__))
    (b* (((vl-tokstream-backup backup))
         (curr-pstate (vl-tokstream->pstate))
         (- (if (equal (vl-parsestate->usertypes curr-pstate)
                       (vl-parsestate->usertypes backup.pstate))
                nil
              (vl-parsestate-free curr-pstate)))
         (new-pstate (vl-parsestate-restore backup.pstate))
         (tokstream (vl-tokstream-update-pstate new-pstate))
         (tokstream (vl-tokstream-update-tokens backup.tokens)))
      (vl-tokstream-fix))))

Theorem: vl-tokstream-restore-of-vl-tokstream-save

(defthm vl-tokstream-restore-of-vl-tokstream-save
  (equal (vl-tokstream-restore (vl-tokstream-save)
                               :tokstream anything)
         (vl-tokstream-fix)))