Am 17.10.2016 um 11:13 schrieb Martin Baker: > I suspect this is all a bit academic because I get the impression that the > FriCAS compiler is too unpredictable to make the changes to the type system > that > would be required for a more general category theoretic structures. Please > tell > me I'm wrong as it would be really wonderful if FriCAS could support this in > its > most general form. > > Martin B > >
It's a bit academic, indeed. I use macros as Waldek described in a former post - just a pragmatic approach. However, it would certainly be desirable to have a 'maybe' monad in fricas, and I see no reason why it shouldn't be feasible. In OCaml for instance, the monad is implemented in the module 'Option' and seems to me a pretty straightforward approach. On the other hand I'd rather like a "partial" monad instead of "maybe" (which usually means a single terminal symbol "failed"), that is a product type M(T)=T x Q, where Q is a monoid, such that the Kleisli composition evaluates the two programs in sequence and combines their Q output. Example: Q=(String, conctenation). -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. To unsubscribe from this group and stop receiving emails from it, send an email to fricas-devel+unsubscr...@googlegroups.com. To post to this group, send email to fricas-devel@googlegroups.com. Visit this group at https://groups.google.com/group/fricas-devel. For more options, visit https://groups.google.com/d/optout.
