FramerD

See http://www.framerd.org The version 0.4 of NuNu used language and database from FramerD.

FramerD is mostly (see what's missing) a structural match.

ftp://ftp.media.mit.edu/pub/framerd/

Issues

The language implementation of version 2.0 beta is buggy to the degree of beeing useless for stable products at top of it.

we had
 - loop with named let segfault unpredictable; workaround: use do forms instead
 - no tail recursion
 - once data exceeded a certain limit, the application broke.

What's missing?

guarded slots

FramerD should have a way to specify functions like genX's read and write methods, which "guard" their slots, i.e., only those methods must be able to modify the slot.

This is actually almost there: you can index a slot with another oid. Then, if the other one has certain slots set to Scheme expressions, these are evaluated with certain names bound. It's called something like virtual slots, but this doesn't help much because the actual value of the slot is not bound to any of the pre-bound names. (contrary to the documentation).