From help-octave-request at bevo dot che dot wisc dot edu  Tue Jan 20 03:03:35 1998
Subject: Re: How to tell a function from a string
From: "Lorenzo M. Catucci" <lorenzo at argon dot roma2 dot infn dot it>
To: help-octave at bevo dot che dot wisc dot edu
Date: Tue, 20 Jan 1998 10:03:25 +0100 (CET)



On Tue, 20 Jan 1998, John W. Eaton wrote:

> On 17-Jan-1998, Lorenzo M. Catucci <lorenzo at argon dot roma2 dot infn dot it> wrote:
> 
> Unfortunately, there isn't a good way to do this from Octave, though
> you could probably wrap is_valid function from src/variables.cc in a
> DEFUN easily enough.
> 
> In 2.0.x, you can do something like this (from src/lsode.cc):
> 
>   tree_fvc *lsode_fcn = is_valid_function (args(0), "lsode", 1);
> 
>   if (! lsode_fcn)
>     error ...
> 
> In 2.1.x and later the interface will change.  You will have to use
> octave_function* instead of tree_fvc*.
> 
Now comes another question: does there exist some reason not to have such
a wrapper defined into octave's main? 

Yours,


lorenzo