I'm trying your first suggestion, and it brings me to an issue I've faced some
other time as well. How can I customized an imported parameter for an
interaction session?
More precisely here, how can I specify that I want a specific
pretty-print-print-hook for the whole evaluator?
If I wrap the expression in the @interaction, it does not work:
@interaction[
(parameterize ([pretty-print-print-hook
(let ([oh (pretty-print-print-hook)])
(λ (value display? port)
(cond .... ;; big blob from the file you pointed out
4/3)
]
Thanks,
-- Éric
On Nov 19, 2011, at 12:20 PM, Matthew Flatt wrote:
> At Fri, 18 Nov 2011 12:30:48 -0300, Eric Tanter wrote:
>> In the interaction window, 4/3 is rendered as "1 1/3" (with nice
>> formatting), but in a scribble @interaction, it is rendered as "4/3".
>> Is there a way to get the nicer output in scribble?
>
> There are two obstacles:
>
> * The number conversion is wired into DrRacket at the moment --- in
> "collects/drracket/private/language.rkt"'s parameterization of
> `pretty-print-print-hook'.
>
> You could set up pretty printing and a print hook in the same way
> within a Scribble evaluation sandbox.
>
> * Number snips currently do not draw themselves as evaluation results.
>
> It might be a good idea to make snips in general display themselves
> within Scribble documents (i.e., by having `snip%' implement the
> `file/convertible' protocol), but I'm not sure. It sounds easier to
> make fraction snips specifically support `file/convertible'. Either
> way, it's a change to the existing code.
>
> So, yes in principle, but it's difficult at the moment.
>
>
_________________________________________________
For list-related administrative tasks:
http://lists.racket-lang.org/listinfo/users
