## Copyright (C) 2025
##
## This file is part of Octave.
##
## Octave is free software: you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING.  If not, see
## <https://www.gnu.org/licenses/>.

## -*- texinfo -*-
## @deftypefn {} {@var{tf} =} istable (@var{x})
## Return true if @var{x} is a table object.
##
## @seealso{table, height, width}
## @end deftypefn

function tf = istable (x)
  if (nargin != 1)
    print_usage ();
  endif

  ## Check if x is a struct with Properties field (Octave's table representation)
  ## or if it's a proper table class object
  tf = (isstruct (x) && isfield (x, "Properties")) || ...
       (isobject (x) && strcmp (class (x), "table"));
endfunction


