Gray streams in CMU Common Lisp
Robert STRANDH
I am trying to use Gray streams in CMU Common Lisp (Debian Linux
Potato package), without much success.
I was trying to find out in which package the stream extensions were
located, and found a symbol stream-write-char in the extensions
package, but that symbol does not seem to have a function definition,
though if I understand correctly, it should be a generic function.
Any ideas?
--
Robert Strandh
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Raymond Toy
Robert> Hello,
Robert> I am trying to use Gray streams in CMU Common Lisp (Debian Linux
Robert> Potato package), without much success.
Robert> I was trying to find out in which package the stream extensions were
Robert> located, and found a symbol stream-write-char in the extensions
Robert> package, but that symbol does not seem to have a function definition,
Robert> though if I understand correctly, it should be a generic function.
Robert> Any ideas?
You need a fairly recent version of CMUCL (Potato is I think).
You probably also need the sources, since I don't think the binaries
included the gray streams files you need. If you have sources, the
files you want are in src/pcl/gray-streams-classes.lisp and
src/pcl/gray-streams.lisp.
Compile these in this order and load them in this order. You now have
gray-streams support.
Ray
Fernando Rodríguez
Robert STRANDH escribió:
> Hello,
>
> I am trying to use Gray streams in CMU Common Lisp (Debian Linux
> Potato package), without much success.
What are gray streams? O:-)
TIA
Hannu Koivisto
| You need a fairly recent version of CMUCL (Potato is I think).
In addition one needs to use the image from cmucl-normal (or
-small, I think, but I have tried -normal only) package instead of
cmucl-safe (in potato, at least).
Peter mentioned recently that he has put a new version to woody's
upload queue that should have a gray-stream package that can be
"just loaded" (my /guess/ would be that this works with cmucl-safe
too). So if the original poster uses woody, this new version might
appear soon (it wasn't there yet when I just checked) and be a
little bit easier to get going with gray streams. Of course, it
may be possible to use woody's version in potato too.
--
Hannu
Daniel Barlow
> What are gray streams? O:-)
User-defined streams implemented as per the proposal by David N. Gray
|Problem description:
|
| Common Lisp does not provide a standard way for users to define their
| own streams for use by the standard I/O functions. This impedes the
| development of window systems for Common Lisp because, while there are
| standard Common Lisp I/O functions and there are beginning to be
| standard window systems, there is no portable way to connect them
| together to make a portable Common Lisp window system.
|
| There are also many applications where users might want to define
| their own filter streams for doing things like printer device control,
| report formatting, character code translation, or
| encryption/decryption.
See ftp://parcftp.xerox.com/pub/cl/cleanup/mail/stream-definition-by-user.mail
-dan
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