[r6rs-discuss] Unicode issues

From: Thomas Lord <lord>
Date: Tue, 28 Aug 2007 11:32:27 -0700

John Cowan wrote:
> Thomas Lord scripsit:
>
>
>> Does the CL spec *forbid* adding those features?
>>
>
> It has a notion of "implementation-defined attributes".
>

So, the answer is "no," thus CL did not "regress" in the way that you
claim. Since you recognize that that *would* have been a regression
then, to be consistent, you should either agree that the restrictions in
the R6 core are a regression or else convincingly distinguish the two cases.




> However, you need no such permission from the spec to extend
> the attributes of characters. If you want to give symbols
> p-lists, you can do that too.
>
>

I'm not sure why you bring that up, but...

I've begun to think that, in the core, all values should (eqv-based)
properties. MIT Scheme tried to do this by adding weak references
and built-in hash values but a GC implementation seems to me to really
have to stand on its head to get from those lower level features back
to fast properties.

-t
Received on Tue Aug 28 2007 - 14:32:27 UTC