[Octave-bug-tracker] [bug #54028] copy of non-handle class instance is not deep

[A.R. Burgers]

URL:
  <http://savannah.gnu.org/bugs/?54028>

                 Summary: copy of non-handle class instance is not deep
                 Project: GNU Octave
            Submitted by: arb
            Submitted on: Thu 31 May 2018 09:36:37 PM UTC
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.4.0
        Operating System: Any

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Details:

Copying a class does not create a copy of an object array property, where as
matlab does make a deep copy in this case.


classdef b
  properties
    a_array;
  end
end



classdef a
  properties
    ap = 1;
  end
end


a script use_b.m that attempts a copy of an instance of class b, where a_array
is an object array.


ver = version()
bi = b();
bi.a_array = a;
bi.a_array(end+1) = a;
% make copy of bi to bi_copy
bi_copy = bi;
% change first element of object array in copy
bi_copy.a_array(1).ap = 2;
% report first element of object array in original
bi.a_array(1).ap


output with octave


ver = 4.4.0
ans =  2


output with matlab


ver = 8.6.0.267246 (R2015b)
ans = 1





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