Fine-grained control flow

The “do” macros (do, do*, dolist, and dotimes) have bodies that act like tagbody. You can put go tags anywhere in the body and use go to jump to them from arbitrary places. This can be useful for skipping, retrying, or otherwise changing the flow of iteration.

For example:

(dolist (users (get-user-list)) 
  (when some-condition
    (go :retry)