Re: [Chicken-users] Using egg getopt-long, basic question.

[Peter Bex]

On Thu, May 13, 2010 at 06:47:40PM -0300, Christiano F. Haesbaert wrote:
> Hi,
> 
> I'm new to this list (and to scheme), don't know if this kind of
> question is appropriate, here it is:

Sure, this list is fine for generic questions.

> I'm trying to use getopt-long, the first argument is a list of strings, like:
> 
>         (getopt-long '("program" "--ram" "foo" "bar")
>                       grammar))
> 
> --> ((@ "program" "foo" "bar") (ram . #t))
> 
> What is that @ ?

A quick check of the source code reveals this comment:

"There is a special item in the returned alist with a key @: the list of
 arguments that are not options or option values."

The @ is just a literal symbol with the string value "@".

Looks like the egg documentation is just lacking; it doesn't mention
the @ sign at all.

Cheers,
Peter
-- 
http://sjamaan.ath.cx
--
"The process of preparing programs for a digital computer
 is especially attractive, not only because it can be economically
 and scientifically rewarding, but also because it can be an aesthetic
 experience much like composing poetry or music."
                                                        -- Donald Knuth