Re: client/server operation of octave?

[Paul Kienzle]

On Jan 11, 2007, at 6:15 AM, address@hidden wrote:

> > -----Ursprüngliche Nachricht-----
> > Von: Paul Kienzle <address@hidden>
> > Gesendet: 10.01.07 17:38:23
> >
> > > > > Tino Scherrer <address@hidden> writes:
> > > > >
> > > > > > Dear all, for the integration of octave into a development
> > > > > > environment I'd need some means to control octave and receive it's
> > > > > > output. Ideally this would work by starting octave as sort of
> > > > > > server and connect the development tool as client through a socket
> > > > > > connection. Is such a mode available for octave?
> > soctcl on octave-forge provides a server interface to octave.
> >
> > It didn't occur to me to feed it through the read-eval-print loop 
> > since
> > I wasn't trying to write an IDE, but it might be a place for you to
> > start.
> >
> > - Paul
>
> soctcl provides an octave function that lets you evaluate octave 
> expressions by external programs through a socket, do I understand 
> this correctly?

That is correct.

> One of the most important features that I need in an IDE is debug 
> functionality including that I can easily browse to the exact error 
> location of  any error message (for example octave output is something 
> like "error in line 20 of file test.m", I click on this message and 
> the editor opens test.m and scrolls to line 20). Is this possible 
> using soctcl? I guess that error messages still appear in the initial 
> octave output, so that the connected external program has no means of 
> interpreting them.

I make no attempt to capture the error.  Instead I do the equivalent of

  feval("eval","octave expression","senderror(lasterr);");

You can't introspect on the call stack in Octave, though on break you 
can find the current file/function/line.  This isn't supported in the 
listen() code.

> Besides, is the described link-errors-to-line-in-source-file possible 
> with emacs' inferior-octave mode?

It would be easy enough to expose the current file/function/line to the 
interpreter.

- Paul