[gambit-list] builtin syntax, namespaces and expansion loops
Christian
christian at pflanze.mine.nu
Fri Jun 24 09:12:44 EDT 2005
Hello
I've noticed that one cannot refer to builtin syntax using fully
qualified notation (something like foo#quasiquote isn't defined; so
builtin syntax is present in every namespace but not accessible with
any full qualification) and one thus cannot write macros substituting
the builtin syntax with something else and then still call the
original syntax in the generated code:
(define-macro (quasiquote . l)
(display "quasiquote called\n")
`(quasiquote , at l))
`1
=> leads to infinite loop, and there's no apparent way around that.
Additionally, this loop cannot be terminated by hitting ctl-c, which
means the whole process has to be terminated.
Is there a way to write the above quasiquote wrapper so that it works?
Thanks
Christian.
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