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Allegro CL
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  6 Iteration   6.1 The LOOP Facility   6.1.2 Variable Initialization and Stepping Clauses   6.1.2.2 Local Variable Initializations

6.1.2.2.1 Examples of WITH clause

;; These bindings occur in sequence.
 (loop with a = 1 
       with b = (+ a 2) 
       with c = (+ b 3)
       return (list a b c))
 (1 3 6)
 
;; These bindings occur in parallel.
 (setq a 5 b 10)
 10
 (loop with a = 1
       and b = (+ a 2)
       and c = (+ b 3)
       return (list a b c))
 (1 7 13)
 
;; This example shows a shorthand way to declare local variables 
;; that are of different types.
 (loop with (a b c) of-type (float integer float)
       return (format nil "~A ~A ~A" a b c))
 "0.0 0 0.0"
 
;; This example shows a shorthand way to declare local variables 
;; that are the same type.
 (loop with (a b c) of-type float 
       return (format nil "~A ~A ~A" a b c))
 "0.0 0.0 0.0"

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