File: mularg.scm

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slib 3a4-4
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;;; "mularg.scm" Redefine - and / to take more than 2 arguments.

(define (mul:argumentizer op)
  (lambda (d1 . ds)
    (cond ((null? ds) (op d1))
	  ((null? (cdr ds)) (op d1 (car ds)))
	  (else (for-each (lambda (d) (set! d1 (op d1 d))) ds) d1))))
;@
(define / (let ((/ /)) (mul:argumentizer /)))
(define - (let ((- -)) (mul:argumentizer -)))