Com S 342 meeting -*- Outline -*-

* The define sugar in Scheme

  It's helpful to have this example handy for the summary that follows.

** problem

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	PROBLEM

Tedious syntax, common pattern

(define square
  (lambda (x)
    (* x x)))

(define compose
  (lambda (f g)
    (lambda (x)
      (f (g x)))))
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     SUGAR FOR DEFINE IN SCHEME

(define (square x)
  (* x x))

(define (compose f g)
  (lambda (x)
    (f (g x))))

Desugaring rule:

 (define (name v1 ...)
    body)

==>



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    ... (define name
          (lambda (v1 ...)
            body))

	Q: What are the advantages of this?