[Octave-bug-tracker] [bug #42735] subclass inheritence: symbol ops (e.g., plus, mtimes) do not respect superiorto

[Mike Miller]

Update of bug #42735 (project octave):

                  Status:                    None => Confirmed              
        Operating System:               GNU/Linux => Any                    

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Follow-up Comment #3:

The cause of this behavior is right here


    std::string dispatch_type
      = a1.is_object () ? a1.class_name () : a2.class_name ();


http://hg.savannah.gnu.org/hgweb/octave/file/b5407b1ab11a/libinterp/operators/op-class.cc#l81

When a binary operator is called with one or two class arguments, the class
type of the left hand argument takes precedence. There should be additional
checking if they are both class types.

Can you test what Matlab does in this case if the two classes are completely
unrelated (no inheritance, no superiorto declaration, just two classes that
both provide plus methods)?

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