Re: Octave classes

[Massimo Manghi]

On 10/02/2012 02:28 PM, Jordi Gutiérrez Hermoso wrote:
> On 2 October 2012 08:20, Juan Pablo Carbajal<address@hidden>  wrote:
>
> > afaik, there is no inheritance in Octave classes.
>
> Of course there is. Otherwise, what's the point of having classes at all?
>
>      
> http://www.gnu.org/software/octave/doc/interpreter/Inheritance-and-Aggregation.html
>      http://www.gnu.org/software/octave/doc/interpreter/Overloading-Objects.html

Thanks Jordi and Juan

so the bottom line is that for the time being I have to prepare myself 
my own base class. Good to know.

Scripting an object systems almost certainly requires some degree of 
introspection (the larger the better).

So I go back to the original question. I noticed a discrepancy between 
the functions 'fieldnames' and 'isfield': 'fieldnames(...)' returns an 
array of fields of a structure or a class, 'isfield(struct,field_name)' 
doesn't know how to handle a class object and returns invariably 0, even 
though it could be based on the former simply comparing each field in 
the list returned by 'fieldnames' to the given field_name. This looks to 
me like a bug or a missing feature...

> Octave currently only implements old-style Matlab classes. There's
> some preliminary work for classdef, but it will probably take some
> time to come to fruition, unless you help.
>
> - Jordi G. H.

I have a decent experience programming C++ and I wrote a couple of C++ 
command extensions to Octave, but I never tweaked the core. So the 
answer is yes, I could consider to help if you get me on the right track 
(subscribing octave-dev? Contacting the person who is carrying on the 
development of the object system?)

 -- Massimo