[plt-scheme] struct-copy

#lang scheme
(define-struct posn (x y) #:transparent)

(define p0 (make-posn 0 0))

(define p1
  (struct-copy posn p0
             [x 5]))

p0
p1

=>

#(struct:posn 0 0)
#(struct:posn 5 0)

On Tue, Mar 24, 2009 at 7:36 PM, Jay Riddle <jcriddle4 at yahoo.com> wrote:
>
>
> Does someone have a simple example of using struct-copy?
>
> --JayR
>
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-- 
Jay McCarthy <jay at cs.byu.edu>
Assistant Professor / Brigham Young University
http://teammccarthy.org/jay

"The glory of God is Intelligence" - D&C 93