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diff --git a/octave_packages/m/deprecated/dispatch.m b/octave_packages/m/deprecated/dispatch.m
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+## Copyright (C) 2010-2012 John W. Eaton
+##
+## 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
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Loadable Function} {} dispatch (@var{f}, @var{r}, @var{type})
+##
+## Replace the function @var{f} with a dispatch so that function @var{r}
+## is called when @var{f} is called with the first argument of the named
+## @var{type}.  If the type is @var{any} then call @var{r} if no other type
+## matches.  The original function @var{f} is accessible using
+## @code{builtin (@var{f}, @dots{})}.
+##
+## If @var{r} is omitted, clear dispatch function associated with @var{type}.
+##
+## If both @var{r} and @var{type} are omitted, list dispatch functions
+## for @var{f}.
+## @seealso{builtin}
+## @end deftypefn
+
+## Deprecated in version 3.4
+
+function varargout = dispatch (varargin)
+
+  persistent warned = false;
+  if (! warned)
+    warned = true;
+    warning ("Octave:deprecated-function",
+             "dispatch is obsolete and will be removed from a future version of Octave; please use classes instead");
+  endif
+
+  varargout = cell (nargout, 1);
+  [ varargout{:} ] = __dispatch__ (varargin{:});
+
+endfunction
+
+
+%!test # builtin function replacement
+%! dispatch('sin','length','string')
+%! assert(sin("abc"),3)
+%! assert(sin(0),0,10*eps);
+
+%!test # 'any' function
+%! dispatch('sin','exp','any')
+%! assert(sin(0),1,eps);
+%! assert(sin("abc"),3);
+
+%!test # 'builtin' function
+%! assert(builtin('sin',0),0,eps);
+%! builtin('eval','x=1;');
+%! assert(x,1);
+
+%!test # clear function mapping
+%! dispatch('sin','string')
+%! dispatch('sin','any')
+%! assert(sin(0),0,10*eps);
+
+%!test # oct-file replacement
+%! dispatch('fft','length','string')
+%! assert(fft([1,1]),[2,0]);
+%! assert(fft("abc"),3)
+%! dispatch('fft','string');
+
+%!test # m-file replacement
+%! dispatch('hamming','length','string')
+%! assert(hamming(1),1)
+%! assert(hamming("abc"),3)
+%! dispatch('hamming','string')
+
+%!test # override preloaded builtin
+%! evalin('base','cos(1);');
+%! dispatch('cos','length','string')
+%! evalin('base','assert(cos("abc"),3)');
+%! evalin('base','assert(cos(0),1,eps)');
+%! dispatch('cos','string')
+
+%!test # override pre-loaded oct-file
+%! evalin('base','qr(1);');
+%! dispatch('qr','length','string')
+%! evalin('base','assert(qr("abc"),3)');
+%! evalin('base','assert(qr(1),1)');
+%! dispatch('qr','string');
+
+%!test # override pre-loaded m-file
+%! evalin('base','hanning(1);');
+%! dispatch('hanning','length','string')
+%! evalin('base','assert(hanning("abc"),3)');
+%! evalin('base','assert(hanning(1),1)');
+%! dispatch('hanning','string');