Re: [Matlab-emacs-discuss] Debugging, tab completion in matlab-shell?

[Eric L. <Eri...@ma...>]

Hi,

I gave this a quick run and found that it was working as I expected still, and I have the CVS version of matlab.el, with no pending changes.

When "tab" is pressed, it should split the window, and display the completions in a separate buffer, independent of the matlab-shell buffer.  It will also do the completion if there is only one option.  The misc text you quoted below is what matlab-shell does under-the-covers to get the completion list.

It works internally by flipping into a "capture some text" mode, then back out again when the capture is done, or when another prompt ">>" is shown again.  K prompts "K>>" and student prompts "EDU>>" should also work.

It will also key off of carriage returns, and a few other things to try and distinguish between text to be captured, text to turn into links, and regular text.

I'll take a guess that some bit of text has put it into a bad state.  Here are some possibilities:

If you have some non-standard prompt, see line 4392 where comint-prompt-regexp is set.  There are a few other hard-coded prompts around too.

If the error text is somehow "new", or contains bad text, look at matlab-shell-render-errors-as-anchor, or matlab-shell-render-html-as-anchor, and the regular expressions that go into those.

Lastly, there is matlab-shell-collect-command-output, which captures output, which sends a command, then spins waiting for a prompt to come up.  This is exiting early w/ your tab completion.  Perhaps there is an issue with carriage returns?

Good Luck
Eric

-----Original Message-----
From: Leo Alekseyev [mailto:dn...@gm...] 
Sent: Friday, March 05, 2010 11:22 PM
To: mat...@li...
Subject: [Matlab-emacs-discuss] Debugging, tab completion in matlab-shell?

Hi all,
I recently started using matlab-emacs (with matlab-shell) on a more
regular basis, and I am reasonably happy with the workflow -- but I am
also seeing some anomalies, in particular with debugging and
tab-completion.

First, if I encounter an error during execution, the offending file
name does not turn into a link (like it does using Matlab GUI), which
I believe should also be happening here.  This also appears to break
the "go to last error" functionality: if there are links anywhere else
in the command window (e.g. as a result of "help" command) the "go to
last error" will follow the link e.g. to the documentation page,
ignoring the error.  (If there aren't links, then it will jump to the
error line in the offending file, but if I've run "help" on any
command, the go-to-last-error is now broken for this session).  I
would really appreciate pointers on how I might troubleshoot this --
the behavior is clearly broken.

Second (minor) issue is that tab completion (e.g. typing test<tab>)
dumps the following to the buffer:
>> matlabMCRprocess = com.mathworks.jmi.MatlabMCR
 matlabMCRprocess =
 com.mathworks.jmi.MatlabMCR@7deb41d6
 >> matlabMCRprocess.mtFindAllTabCompletions('test'), clear('matlabMCRprocess');
 ans =
 java.lang.String[]:
     'test'
    'test_step_by_step'
    'test_trainlm_gradient'
    'testm'
    'testobjectiveinfo'
    'testscript

It this the intended behavior?..  Would it be possible to just display
stuff after java.lang.String[]?..

Relevant versions: GNU Emacs 23.1.50.1 (x86_64-pc-linux-gnu), Matlab
7.8.0.347 (R2009a) 64-bit (glnxa64), latest version of matlab-emacs
from CVS.
I'd appreciate any pointers regarding the above!
Thanks,
--Leo

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