[r6rs-discuss] Re-hashing hygiene
lord at emf.net
Fri Sep 11 19:08:25 EDT 2009
On Fri, 2009-09-11 at 18:48 -0400, John Cowan wrote:
> Thomas Lord scripsit:
> > I happen to also like uninterned symbols for other reasons - they
> > are just a convenient data structure that is usually easy to provide.
> > They are not essential to macro systems in Scheme, though.
> I'm interested in this. What do uninterned symbols do that strings
> do not, other than answering #t to "symbol?"?
In Scheme, one difference of significance is mutability
(yes I know you like to tilt against that windmill).
Another is what `equal?' does. Another is a convenient
(non-essential but convenient) disjointness.
I don't propose them for a core of Scheme. I think
they are a nice feature to have around.
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