Do you perhaps want prop:procedure? Robby
On Tue, Jul 19, 2011 at 6:08 PM, Pavel Panchekha <pavpanche...@gmail.com> wrote: > > I'm trying to port some code from MIT Scheme to Racket. A large part of > the MIT Scheme was a metacircular interpreter, and I'm hoping that I can > use Racket's language definition capabilities to avoid that annoyance. > > But I've hit a snag. One of the important parts of the MIT Scheme > wrapped all objects in another structure. It then distinguished between > primitive functions, for which we would have to unwrap that structure > and use a fallback, and functions defined in the guest Scheme, which > expected wrapped objects and so we could use a smarter apply function. > > In Racket, I can override =%datum=, =lambda=, and similar, to produce > these wrapped objects. But I can't figure out what to do with =%app=. > If there was some primitive for "defined outside this language", I could > use that. Or if there was a way of explicitly "tagging" objects (some > sort of transparent metadata, as has e.g. Clojure), I could tag all of > my non-primitive functions and use that. > > Do you know if anything like either of these options exist? Or is there > some clearer way in Racket to express what I want to do? > > -- > Pavel Panchekha > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users > _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
