From help-octave-request at bevo dot che dot wisc dot edu Thu Jan 29 10:39:59 2004
Subject: Re: varargout form a DLD function
From: Geraint Paul Bevan <g dot bevan at eng dot gla dot ac dot uk>
To: help-octave <help-octave at bevo dot che dot wisc dot edu>
Date: Thu, 29 Jan 2004 16:31:27 +0000

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Shai Ayal wrote on 01/29/04 22:10:
| Hi all,
|
| I am trying to return a variable number of arguments from a DLD function
|

|
| however, I cannot recover these arguments at the command line:

|
| Note that if I know the number of arguments I can get them as in line 4.
| but what if I don't know beforehand ? Is there something similar to
| varargin{:} for output arguments ?
|
|     Shai
|


You can return a variable number of arguments by returning an
octave_value_list as the first element of retval:


~/test:
$ cat varargouttest.cc
#include <octave/oct.h>

DEFUN_DLD (varargouttest, args, nargout, "")
{
	octave_value_list retval, retval2;
	for (int i = 4; i >= 0; i--) {
		retval2(i) = octave_value (1 + i);
	}
	retval(0) = retval2;
	nargout = 5;
	return retval;
}
~/test:
$ mkoctfile varargouttest.cc
~/test:
$ octave -q
octave:1> varargouttest
ans =
(
~  [1] = 1
~  [2] = 2
~  [3] = 3
~  [4] = 4
~  [5] = 5
)
octave:2>

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