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How can I get the variable name of a child object?

Asked by Wesley Allen on 27 Aug 2013
I want to display the name of an object variable in its "disp" method.
I currently do the following:
methods
function disp(this)
objVar = inputname(1);
disp(['Var: (' objVar ')']);
end
end
This works great for a lone object:
>> myObj = myClass();
>> disp(myObj)
Var: (myObj)
>>
However, for a child object, it does not work:
>> myParent = myParentClass();
>> myParent.child = myClass();
>> disp(myParent.child)
Var: ()
>>
How can I get the variable name to display for a child object?
e.g.
>> myParent = myParentClass();
>> myParent.child = myClass();
>> disp(myParent.child)
Var: (myParent.child)
>>

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1 Answer

Answer by Walter Roberson
on 27 Aug 2013

You cannot, at least not without some nastiness involving the program examining its own source code. "myParent.child" is not a variable name. "myParent.child" will be treated as an expression, and expressions that are not simple variable names will always come out empty for inputname() purposes.

  1 Comment

That's what I was afraid of.

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