6.1 The LOOP Facility   6.1.2 Variable Initialization and Stepping Clauses   6.1.2.1 Iteration Control   6.1.2.1.5 The for-as-across subclause

6.1.2.1.5.1 Examples of for-as-across subclause

 (loop for char across (the simple-string (find-message channel))
       do (write-char char stream))