Re: LISP: Very Very Basic Question.

[lawrence mitchell]

Gurucharan wrote:

> Hello All,
>        Can anyone explain the way in which the LISP "list"
> is implemented internally ?

It's implemented in C in Emacs.  You can find the definition in
alloc.c, if you don't have the Emacs sources handy, have a look
at: <URL: http://savannah.gnu.org/cgi-bin/viewcvs/emacs/emacs/
src/alloc.c?rev=1.296&content-type=text/vnd.viewcvs-markup>

/----[ `list' implementation ]
| DEFUN ("list", Flist, Slist, 0, MANY, 0,
|        doc: /* Return a newly created list with specified
| arguments as elements.
| Any number of arguments, even zero arguments, are allowed.
| usage: (list &rest OBJECTS)  */)
|      (nargs, args)
|      int nargs;
|      register Lisp_Object *args;
| {
|   register Lisp_Object val;
|   val = Qnil;
|
|   while (nargs > 0)
|     {
|       nargs--;
|       val = Fcons (args[nargs], val);
|     }
|   return val;
| }
\----



-- 
lawrence mitchell <wence@gmx.li>