[bug #55810] sizeof() and whos() returns 0 bytes for classdef objects

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Update of bug #55810 (group octave):

                  Status:               Confirmed => Ready For Test
         Planned Release:                    None => 12.1.0 (current default)

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Follow-up Comment #12:

Oops. I didn't actually test that classdef. I just put something together for
the comment.
I actually meant to write something like this:

classdef dependent_prop < handle
  properties
    a
  end
  properties (Dependent)
    b
  end

  methods
    function set.b(this, value)
      this.a = value;
    end
    function value = get.b(this)
      value = repmat (this.a, 1, 2);
    end
  end
end


IIUC, the problem with my test classdef was with `get.b` not with `set.b`.
The modified test classdef is pretty close to the example on
https://www.mathworks.com/help/matlab/matlab_oop/access-methods-for-dependent-properties.html#buo0gv5.

And I also didn't think of the fact that handle classes won't actually show up
with the sizes of their properties. Thanks for catching that.

Nice this is working as expected with your patch.

After checking that it builds and works correctly on Windows, I pushed the
change to the default branch (hg id ).

Marking as ready for test.


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