nargchk.m - obsolete(?) error message

[John W. Eaton]

On 15-May-2009, Alois Schlögl wrote:

| Currently (Octave 3.1.55), the command nargchk fails if 4th input
| argument is 'struct' with the following error message:
| 
| 
| octave:26> nargchk(1, 3, nargin,'struct')
| error: nargchk: error does not yet support struct inputs
| error: called from:
| error:   /usr/local/share/octave/3.1.55/m/general/nargchk.m at line 64,
| column 1
| 
| 
| As far as I understand it, the 4th input argument just says whether the
| output should be a struct or string. If I'm right, the error message is
| obsolete and the following patch should be applied.

I applied the patch since the error function no longer fails if the
argument is a struct.  But it doesn't quite work right either.  For
example, I see:

  octave:1> nargchk (2, 4, 5, "struct") 
  ans =
  {
    message = too many input arguments
    identifier = Octave:nargchk:too-many-inputs
  }

  octave:2> error (nargchk (2, 4, 5, "struct"))
  error: unspecified error

but I think the call to error should print

  error: too maany input arguments

instead of "unspecified error".

jwe