I think you'll want to override the current-print <http://docs.racket-lang.org/reference/eval.html?q=current-print#%28def._%28%28quote._~23~25kernel%29._current-print%29%29> parameter.
On Thu, Nov 26, 2015 at 7:16 PM, Paolo Giarrusso <p.giarru...@gmail.com> wrote: > Hi all! > > How does the REPL print values? In some circumstances I see graph printing > markers, even though `(print-graph)` is disabled. Because these are error > messages for students using teaching languages, cycle printing is not an > option. > > messages.rkt> (print-graph) > #f > messages.rkt> (list (game-state p p p)) > (list (game-state (posn 150 100) (posn 150 100) (posn 150 100))) > messages.rkt> (~v (list (game-state p p p))) > "(list (game-state #0=(posn 150 100) #0# #0#))" > > Funnily, that doesn't happen in DrRacket, but it does happen both in > racket-mode, in my actual production environment, and under raco test. In > particular, test results in DrRacket are the ones I'd want, but are > inconsistent with the ones everywhere else. > > Apart from being frustrated at parameters, how do I gain control over this? > > PS: I've just found that `global-port-print-handler` is customized by > DrRacket. That seems incompatible with using `print` and relying on it > producing certain results. I understand that's the point of `print`, but > neither `write` nor `display` does what I want. > > HTDP code itself uses `~e` (also in htdp/error), but finding the > appropriate handler to install isn't trivial either; and that's not enough, > because sometimes I need to show the source code we evaluated. > > Sorry for how chaotic is this message — I guess that reflects my confusion > at Racket printing. (I've taken some looks at the relevant documentation, > but not at all of it). > > Cheers, > Paolo > > -- > 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. > For more options, visit https://groups.google.com/d/optout. > -- 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. For more options, visit https://groups.google.com/d/optout.
