On Thu, 9 Dec 2004, Felix Winkelmann wrote:

> Hm... Non-generative record definitions would be nice.

Yes, although the particular Chez Scheme specification would be difficult
to implement portably.

One thing I like about the current specification is that it can be
implemented as a macro layer on top of SRFI-9, as the reference
implementation indeed does, without having to manipulate the innards, in
particular the record type descriptors, of SRFI-9.  Because of this
philosophy, it can be used on any Scheme implementation that has SRFI-9,
and it can also be easily adapted to Schemes that have their own
efficient native records.  Including nongenerativity would make this
impossible, and for this reason is perhaps better left to a future SRFI.

Regards
Andre