[Octave-bug-tracker] [bug #53844] handle class: delete destructor method cannot access class properties

[Mike Miller]

Follow-up Comment #13, bug #53844 (project octave):

Thank you, this improves things quite a bit. I still have one more case where
this deferred deletion does not work, where a temporary instance of a class is
deleted too soon.

Consider the following toy class


classdef toyclass < handle

  properties
    value
  endproperties

  methods

    function self = toyclass (x)
      if (nargin < 1)
        x = 0;
      endif
      self.value = x;
    endfunction

    function delete (self)
      fprintf (stderr, '');
    endfunction

    function ret = subsref (self, idx)
      ret = self.value;
    endfunction

  endmethods

endclassdef


And the following examples


>> x = toyclass;
>> x.value
ans = 0
>> class (toyclass)
ans = toyclass
>> size (toyclass)
ans =

   1   1

>> toyclass ().value
>>


In the last statement, the constructor returns a valid object, but it is
deleted before the subsref is done successfully on the temporary value.

As before, if there is no delete method, or if the body of the delete method
is empty, this problem does not appear.

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