[gambit-list] anyone get schelog working with gambit-c?
Christian Jaeger
christian at pflanze.mine.nu
Fri Aug 24 08:22:43 EDT 2007
|/|/ Bendick wrote:
> I understand the importance of different implementations of the same
> language having the same semantics, but are there any reasons why it
> would be a bad thing to create a language , suspiciously similar to
> scheme, where () is self evaluating?
>
For the record, here's Common Lisp's behaviour (at least how SBCL 0.8.16
works):
* ()
NIL
* nil
NIL
* '(a b c)
(A B C)
* '(a b nil)
(A B NIL)
* '(a b ())
(A B NIL)
* '(a b . nil)
(A B)
I guess the Schemes which make () self quoting do this mainly for people
coming from CL.
But I think requiring the user to quote it is fine. It's making for
consistent list handling, and cases where you open a pair of parens in
Emacs, and then forget to fill something in, will be trapped as error.
(I'm coming from Perl but I *like* that Scheme is explicit in such
things (also for example the explicit string/number/boolean types).)
That said, this is an example where you could add a rule to a module
processor to interpret code which relies on self-quoting () on an
evaluation/compilation engine which doesn't allow those. I'll do it,
promised (may take some time still).
Christian.
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