On Tue, Apr 14, 2020 at 12:04:22PM -0700, Raoul Schorer wrote: > Hi, > > The printer and reader doc states that the default printer can write *core* > types to be re-read later. > I am making a kind of "3d IDE" for a custom language using the pict3d lib. > I would like to re-use the pict3d types, and prototype with an interpreter > that consumes a valid racket datastructure, since my language would not be > practical in text format and to avoid writing a lexer/parser. > > Is there a way to dump a program datum containing custom types such as > those in pict3d to a file as text, to use as "source code"? > > For example, > > #lang racket > (require pict3d) > (define o (open-input-string)) > (write (pos 0 0 0) o) > (read (open-input-port (get-output-string o))) > > > yields: 'origin, that doesn't mean anything out of the pict3d context. So > how can I make that work? > > Essentially, I'd like something equivalent to the below (incorrect): > > #lang racket > (define o (open-output-string)) > (module m racket > (require pict3d) > (pos 0 0 0)) > (write m o) > (read (open-input-string (get-output-string o))) > > > Is that possible? > > Thanks, > Raoul
Let me warn you. Two things that seem to me to be missing from pict3d: * the ability to paste textures onto objects * The ability to do intersections on objects and excisions of one object from another (eaving a hole) Maybe I just haven't found these features, but uf you think you might need them, you should watch out. Also, a fair amount of the code is written in typed racket. (I'm not sure how much). If you pass in a complex pict3d data structure from outside, it may take substantial time doing the necessary type check. And although struct declaration has an option to provide a print function for the new type (which may well be the deature you seek), I haven't seen that option being available in typed racket. I'd be delighted to be wrong about this. -- hendrik > > -- > 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/1a126873-2454-4f8c-bc29-e5bb6b6ba42f%40googlegroups.com. -- 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/20200414194907.grotn4qsjznbho2r%40topoi.pooq.com.
