SchemeTraceDefine

Aus ProgrammingWiki

Archivierte Version vom 2018-09-21T06:29:34+00:00. Aktuelle Version

(define indent 0)
(define-macro (trace-lambda expr)
  (lambda (n fak)
    (set! indent (+ indent 1))
    (print (make-string indent #\space) (quote ,expr))
    (let ([r  ,expr])
      (print (make-string indent #\space) r)
      (set! indent (- indent 1))
      r
    )
  )
)

(define x
  (trace-lambda (n) 
    (+ n n)))

(x 4)

SchemeTraceDefine

Suche