Re: Overriding builtins

[Søren Hauberg]

Jurgen Pletinckx skrev:
> Dear all,
>
> I am trying to get an existing Matlab codebase running on
> Octave (2.1.73). A first hurdle I face is the incompatibility
> between Octave's false (which returns a single boolean) and
> Matlabs false (which works like logical(zeros(args)), and can
> return multi-dimensional arrays).
Octave 2.9.9+ and earlier releases in the 2.9.x series is matlab 
compatible. So I'm guessing that the best route for you is to upgrade to 
the development releases.

> Altering the existing scripts would work, obviously. So would 
> patching data.cc. But it seems to me that overriding the 
> built-in function (well, constant, actually) might be the
> quickest way.
>
> Is that possible? If so, how do I go about it?
I don't think you can overwrite keywords like "false" as I believe they 
are part of the language and not just functions (not sure on this, 
though). So I see two routes for you (others might see other routes)
  1) upgrade to the 2.9.x series, or
  2) change your scripts (this can be done in a matlab compatible way 
by using "zeros(n, 'logical')' instead of "false(n)").

Søren
> Thanks,