On Tue, May 18, 2021 at 4:09 PM Philip McGrath <[email protected]> wrote:
> On Tue, May 18, 2021 at 3:52 PM Sam Tobin-Hochstadt <[email protected]> > wrote: > >> I think the key question is what you want to happen if you would need >> to re-run the "pre" thunk, because you re-enter the code via a >> continuation. >> >> In many cases, you don't want to support that at all … >> > > Then you can use `call-with-continuation-barrier`, right? > > (let* ([conn (connect-to-server)]) > (dynamic-wind > void > (λ () > (call-with-continuation-barrier > (λ () > (send-message conn "hi")))) > (λ () > (finalize-connection conn)))) > > I think I don't understand cwcb well enough to get this, but the connect call is not in the pre thunk so it's not guaranteed to happen...right? -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/0100017981191578-b5eaa465-de2a-4f1f-a4f1-d2976db88de0-000000%40email.amazonses.com > <https://groups.google.com/d/msgid/racket-users/0100017981191578-b5eaa465-de2a-4f1f-a4f1-d2976db88de0-000000%40email.amazonses.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/CAE8gKodVmpqrNQMhEiX2QOi-CTQkO_s96%3Dgdoks4wt93%2Bmxy6g%40mail.gmail.com.
