From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Davison Subject: Re: [babel] passing strings in Date: Thu, 25 Mar 2010 12:49:15 -0400 Message-ID: <87ljdgxs6s.fsf@stats.ox.ac.uk> References: <87eij8whoa.fsf@cuma.i-did-not-set--mail-host-address--so-tickle-me> <87ljdgjsr2.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NuqFK-0000eS-2l for emacs-orgmode@gnu.org; Thu, 25 Mar 2010 12:49:26 -0400 Received: from [140.186.70.92] (port=38699 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NuqFI-0000dY-Gl for emacs-orgmode@gnu.org; Thu, 25 Mar 2010 12:49:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1NuqFF-00065i-V5 for emacs-orgmode@gnu.org; Thu, 25 Mar 2010 12:49:24 -0400 Received: from markov.stats.ox.ac.uk ([163.1.210.1]:46219) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NuqFF-00065a-Nb for emacs-orgmode@gnu.org; Thu, 25 Mar 2010 12:49:21 -0400 In-Reply-To: <87ljdgjsr2.fsf@gmail.com> (Eric Schulte's message of "Thu, 25 Mar 2010 10:00:40 -0600") List-Id: "General discussions about Org-mode." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org To: Eric Schulte Cc: maurizio.vitale@polymath-solutions.com, emacs-orgmode@gnu.org "Eric Schulte" writes: > Hi Maurizio, > > The ip addresses in your table are being interpreted as source/reference > names which org-babel is trying to resolve. In order to differentiate > between strings and reference names, we either must surround all strings > in double quotes (as below) or we must end all references with "()" and > disallow any strings which end in "()". Hi Eric, Thanks for the much better answer. I think my vote goes for your second option. In other words, :var x=blockname passes the string "blockname", whereas :var x=blockname() passes the result of evaluating a block called "blockname". One argument for this is that in order to pass arguments to a block being evaluated as a reference, users are already obliged to use the parenthetic function call syntax: :var x=blockname(arg1=val1) so demanding the parentheses in the absence of arguments is natural (and perhaps even serves to remind users of the possibility of passing arguments). Also I think that users will probably pass strings more often than they will pass the results of block reference evaluations, so interpreting :var=blockname as a string literal may also be justified by Least Surprise for naive users (e.g. apparently me...). Dan > Currently we are taking the > former approach, which means your table will require the following to > work... > > #+TBLNAME: system-host-ping :var host=system-hosts > | name | ip | ping | > |--------+------------------+----------------| > | host 1 | "192.168.10.200" | 192.168.10.200 | > | host 2 | "192.168.10.24" | 192.168.10.24 | > | host 3 | "192.168.42.24" | 192.168.42.24 | > #+TBLFM: $3='(sbe system-ping (ip $2))' > > #+source: system-ping > #+begin_src sh :var ip=0 > # This is what I eventually want > #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 > #echo $? > > # Testing > echo $ip > #+end_src > > I'd be open to discussion on this issue. I suppose if reference > resolution fails we could try using the name as a string literal, but > that could lead to debugging nightmares... > > Cheers -- Eric > > Maurizio Vitale > writes: > >> In the table/block pair below, I'm trying to pass an IP number to some >> shell code. It seems like in the table formula I can only have >> numbers. Is that right? >> >> #+TBLNAME: system-host-ping :var host=system-hosts >> | name | ip | ping | >> |-----------+----------------+--------| >> | host 1 | 192.168.10.200 | #ERROR | >> | host 2 | 192.168.10.24 | #ERROR | >> | host 3 | 192.168.42.24 | #ERROR | >> #+TBLFM: $3='(sbe system-ping (ip $2))' >> >> #+source: system-ping >> #+begin_src sh >> # This is what I eventually want >> #ping -w 10 -c 1 -q $ip >/dev/null 2>&1 >> #echo $? >> >> # Testing >> echo $ip >> #+end_src >> >> Any way to pass arbitrary strings? >> >> Thanks a lot, >> >> Maurizio >> >> >> >> >> _______________________________________________ >> Emacs-orgmode mailing list >> Please use `Reply All' to send replies to the list. >> Emacs-orgmode@gnu.org >> http://lists.gnu.org/mailman/listinfo/emacs-orgmode > > > _______________________________________________ > Emacs-orgmode mailing list > Please use `Reply All' to send replies to the list. > Emacs-orgmode@gnu.org > http://lists.gnu.org/mailman/listinfo/emacs-orgmode