On Tue, May 18, 2021 at 4:09 PM Philip McGrath <phi...@philipmcgrath.com> wrote:
> On Tue, May 18, 2021 at 3:52 PM Sam Tobin-Hochstadt <sa...@cs.indiana.edu> > 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 racket-users+unsubscr...@googlegroups.com. > 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 racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/CAE8gKodVmpqrNQMhEiX2QOi-CTQkO_s96%3Dgdoks4wt93%2Bmxy6g%40mail.gmail.com.
