'mtrace' will work with reference classes, at least after an object is
instantiated. I'm not familiar with the guts of reference classes, but the
following quick experiment was successful.. If you run the example in
'?ReferenceClasses' up to & including this line :
xx <- mEditor$new(data = xMat)
and then do this:
mtrace( edit, from=attr( xx, '.xData'))
and then run the next line of the example, which is
xx$edit(2, 2, 0)
then the debug window will come up as normal.
Now, what about if you want to mtrace 'edit' before objects are instantiated?
Here the S4 structure defeated me temporarily, but I probably would have been
able to beat it if I'd had more time... There are some notes on debugging S4
methods in 'package?debug' (note that '?mtrace' itself is out-of-date on S4-- I
have gotten S4 debugging to work, but it's only described in 'package?debug')
and that might be enough to get you going.
HTH
Mark ('debug' package author)
Mark Bravington
CSIRO CMIS
Marine Lab
Hobart
Australia
________________________________________
From: r-devel-boun...@r-project.org [r-devel-boun...@r-project.org] On Behalf
Of A Zege [andre.z...@gmail.com]
Sent: 08 April 2011 05:00
To: r-devel@r-project.org
Subject: [Rd] How to debug reference classes?
How do you debug methods of a reference class? I've been using mtrace, which
is excellent, but i cannot figure out how to mtrace a reference class
method. Maybe there is some other way to debug these, for example with
ordinary trace? for now i am only able to use options(error=recover), which
is not giving me idea where exactly in the code i am once i am stopped on an
error.
--
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