> > [Are ISL structures made with define-struct serializable?] > > Kind of. If this is about Universe programming (so that students can send > messages back and forth), I have them write conversion functions: > > (define-struct hh (cakes henries)) > > (define (hh->lists hh) > (list (cakes->lists (hh-cakes hh)) (henries->lists (hh-henries hh))))
It's not actually about Universe programming. It's about caching a data structure that is expensive to produce and will be reused for many queries. I'm gathering from the responses that - Structures created with define-struct are not automatically serializable with `write`. - There is not (yet) a consensus on whether making them so would be a good idea. - S-expressions are serializable, where an S-expression is one of: + number + symbol + string + (listof S-expression) I'm happy enough to have my students convert their data structures to S-expressions, then read and write those. Norman ____________________ Racket Users list: http://lists.racket-lang.org/users