[Octave-bug-tracker] [bug #49793] octave's inputParser only accepts validation functions that return true or false

[Amro]

Follow-up Comment #7, bug #49793 (project octave):

@jwe
if nargout doesn't work with builtins, then calling something like
  ip.addRequired('name',@isnumeric);
will always fail in your solution because "nargout" will throw an error...

I think we need to need to test the error in the catch block and attempt
calling the validation function another time inside a second try/catch if the
error indicated a too-many-output case.

How about this version (it's sort of a hack until "nargout" is fixed):


try
    nout = nargout(val);
catch
    nout = -1;  % val is a builtin function
end

result = true;
try
    if nout ~= 0
        result = val(in);
    else
        val(in);
    end
catch ME
    if strcmp(ME.identifier, 'Octave:TooManyOutputs')
        try
            val(in);
        catch
            result = false;
        end
    else
        result = false;
    end
end



    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?49793>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.gnu.org/