On Fri, 17 Sep 2010 16:41:55 +0200, julien cubizolles <j.cubizolles@free.fr> wrote:
> 
> Le vendredi 17 septembre 2010 à 09:01 +0100, Eric S Fraga a écrit :
> > On Thu, 16 Sep 2010 18:27:18 +0200, julien cubizolles <j.cubizolles@free.fr> wrote:
> > > 
> > > I'm trying to specify a date relative to another date in an org file.
> > > I've tried to adapt one of the examples from worg, with :
> > > 
> > >  <%%(= 7 (- (calendar-absolute-from-gregorian date)
> > >             (calendar-absolute-from-gregorian (02 02 2010))))>
> > > 
> > > to get the date one week after the 2nd of february 2010. Bad sexp...
> > 
> > Quote the date: ... '(02 02 2010)
> > as it is trying to evaluate the function "02" otherwise.
> 
> I'm trying to make it reusable by defining a function in my .emacs :
> 
> (defun diary-relative (n day)
>   "Diary entry that will always appear N days from day"
>   (=
>    (calendar-absolute-from-gregorian date)
>    (+ n (calendar-absolute-from-gregorian day))))
> 
> I try to use it with a sexp like :
> <%%(diary-relative (7 '(09 15 2010)))>
> 
> which doesn't work. I really need to seriously read about lisp
> programming...

Possibly! ;-)

Try <%%(diary-relative 7 '(09 15 2010))>
as the arguments to a function should not be in ()s.