[Openmcl-devel] modify lisp reader

Hans Hübner hans.huebner at gmail.com
Thu Jun 11 07:28:29 PDT 2009


you may be interested in
- It is a GPL'ed implementation of the Common Lisp reader.  If you use
that instead of hacking CCL's internals, you may end up with a
portable solution.

The CL reader, albeit being somewhat extensible, is really not meant
to be flexible enough for implementing sandboxes, source code
processors and the like.  You will always have to resort to
non-portable hacks, and the lack of a specification for that kind of
things makes such hacks inherently risky (i.e. you need to completely
understand all of the reader to make sure that no escape paths exist).


On Thu, Jun 11, 2009 at 10:20, Taoufik
Dachraoui<taoufik.dachraoui at wanadoo.fr> wrote:
> Hi
> I would like to modify the lisp reader as follows:
> 1. add parameter *use-double-colon*  (default to t)
> 2. when (null *use-double-colon*) then the lisp reader must reject any
> use of double colon
> Example:
> (let ((*use-double-colon* nil))
>        (read-from-string "test::x"))
> => Error: use of double colons are not allowed
> Kind regards
> -Taoufik
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