Stephen Eglen's notes on future changes to ESS                   -*- org -*-

* Debugger

Would like to implement a debugger akin to Norm Matloff's work:

http://cran.r-project.org/web/packages/edtdbg/index.html

http://www.stats.uwo.ca/faculty/murdoch/software/debuggingR/

Norm posted that he had started work on ESS, but had to abandon it.


* Comint so slow? ess-eval-visibly-p should be t again.

Why is comint so slow when passing code line by line?  Markus Triska
recently looked at this:

To: ess-help@stat.math.ethz.ch
connect(): No such file or directory
From: Markus Triska <markus.triska@gmx.at>
Date: Sun, 16 May 2010 13:59:57 +0200
Subject: Re: [ESS] ESS on Mac slower than R.app?
Sender: ess-help-bounces@stat.math.ethz.ch

Hi Rodney,

Rodney Sparapani <rsparapa@mcw.edu> writes:

> I think if you update to the latest version of ESS this problem will
> go away.  See the previous discussion of a very similar GNU Emacs bug
> fix at https://stat.ethz.ch/pipermail/ess-bugs/2009q4/000584.html

I think ess-eval-visibly-p should remain true by default, as it is quite
useful. If you change the accept-process-output call in
ess-eval-linewise to:

    (accept-process-output sprocess 0 timeout-ms)

(the difference being that you explicitly state to wait for input from
"sprocess"), the test case works instantly also with ess-eval-visibly-p.

All the best,
Markus