On Wed, Jan 5, 2011 at 6:32 AM, Keiko Nakata <ke...@kurims.kyoto-u.ac.jp> wrote:
> Hello,
>
> Will someone give me an example which shows the continuation barrier
> introduced by 'raise'? I.e., I want an program which raises an exception
> because of the barrier.
>
> I think I do not understand the documentation properly,
> so have been failing to produce such an example myself...
>
How about this one?
(define t (make-continuation-prompt-tag))
(call-with-continuation-prompt
(λ ()
(call-with-exception-handler
(λ (_)
(call-with-current-continuation
(λ (k) (abort-current-continuation t k))
t))
(λ () (raise 3))))
t
(λ (k)
(call-with-continuation-prompt
(λ () (k 4))
t)))
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