Lisp Scheme Part22 - 暇つぶし2ch

Lisp Scheme Part22 ..

342:デフォルトの名無しさん
08/06/06 21:23:17
(define-syntax swap
(syntax-rules ()
((swap a b) (let ((tmp b))
(set! b a)
(set! a tmp)))))

(define-syntax display-line
(syntax-rules ()
((display-line x)
(begin
(display x)
(newline)))))

(define tmp 5)
(define other 6)

(swap tmp other)

(display-line tmp)
(display-line other)

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