hello
I am thinking of such a code like..
#lang scheme
(require racket/gui)
(let ([v (let/ec out
(dynamic-wind
(lambda () (display "in "))
(lambda ()
(display "pre ")
(display (call/cc out))
#f)
(lambda () (display "out "))))])
(when v (v "post ")))
but I still have no idea how
"in pre out in post out " is printed but not "in pre out in pre post out "
how does call/cc and let/ec exactly works?
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