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## distribution or <https://octave.org/copyright/>.
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## -*- texinfo -*-
## @deftypefn  {} {@var{mem_fcn_handle} =} memoize (@var{fcn_handle})
##
## @seealso{clearAllMemoizedCaches}
## @end deftypefn

function mem_fcn_handle = memoize (fcn_handle)

  if (nargin != 1 || nargout > 1)
    print_usage ();
  endif
  if (! isa (fcn_handle, "function_handle"))
    error ("memoize: FCN_HANDLE must be a function handle");
  endif

  mem_fcn_handle = __memoize__ (fcn_handle);

endfunction

%!test
%! fcn1 = memoize (@sin);
%! assert (isa (fcn1, "matlab.lang.MemoizedFunction"));
%! fcn1 (pi);
%! fcn2 = memoize (@sin);
%! fcn2 (2*pi);
%! assert (isequal (fcn1, fcn2))

%!test
%! fcn = memoize (@rand);
%! a = fcn ();
%! b = fcn ();
%! assert (a, b);
%! fcn2 = memoize (@rand);
%! c = fcn2 ();
%! assert (a, c);

%!test
%! fcn = memoize (@plus);
%! fcn.stats;
%! stats (fcn);
%! clearCache (fcn);
%! fcn.clearCache;

# Test input validation
%!error memoize ();
%!error memoize (1, 2);
%!error [a, b] = memoize (1);
%!error memoize (1);