Wed Nov 18 07:35:49 CET 2009

Wrapper-independent code

PF and SC wrap the LEAF objects differently.  How can they share
highlevel EX code?  Currently all "virtual" behaviour is encoded in a
table in the EX struct, but since this is not VM-specific
(i.e. multiple SC or PF VMS, all with their own local memory and GC)
it can maybe be expressed using a static or dynamic linker interface.

OK: made leaf object wrapping virtual + moved a lot of code to from
scheme.c to ex.c