returning a cell array in a octave_value_list ?

[CdeMills]

I tried to find inspiration in strfind.cc.

- the output argument is defined as octave_value retval;
if the first arg is a string, the code is
  retval = octave_value (Array<octave_idx_type>)
if the first arg is a cell array, a new variable retc is defined as a Cell
with the same size as this arg
then it iterate as
     retc(i) = octave_value  (Array<octave_idx_type>)
and finally 
    retval = retc;

So the output is polymorphic: either an array of indexes, either a cell
array of array of indexes

I would like to do the same in sscanf, but its output is an
octave_value_list. I tried using the same mechanism, but I always get back
the scan of the first cell. Any idea ?

Pascal

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