Hi,
i'm currently writing some small helper macros for myself, that makes
chicken's module system syntactically a little bit more similar to
python's one.
I would wish to have a macro that doesn't pollute the current namespace
environment by default. It should introduce for each module a seperate
prefix
Concretly in chicken the following templates
(imports std.list)
should be expanded to:
(import (prefix std.list std.list/))
Hint:
It's the same problem discussed here in
http://lists.nongnu.org/archive/html/chicken-users/2005-08/msg00025.html
(2005)
Unfortunetely, it's not uptodate anymore with chicken's API.
1) I have tried to following snippet
(define-syntax imports
(ir-macro-transformer
(lambda (x i c)
(let ((name (cadr x))
(pre (symbol-append (i (caddr x)) '\.)))
`(import (prefix ,name ,pre))))))
that expands the top expression to:
(import (prefix std.list std.list/)) correctly.
But here the call seems to fail. Functions and the namespace are not
available. If i use directly the expanded
version, it works.
2) If i slighty change the macro definition to give an explicit module
prefix by changing (caddr x) to name within the pre let-binding
(import std.list list) expands to (import (prefix std.list list15141515/))
In the sources it's seems at the first view the import system is very
tight integrated with the macro expansion.
Any ideas how i get it working, if it's possible?
Best regards,
Chris
fty. I'm not familar with low-level macro transformers :] but I got the
prefix symbol extension not working with syntax-rules().
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