[ROOT] Root I/O and object deletion

From: Thomas Bretz (tbretz@astro.uni-wuerzburg.de)
Date: Tue Apr 29 2003 - 15:13:35 MEST 

Dear rooters,

here is a simplified example to illustrate my question: If I have a class

class A : public TObject {
    TNamed *fNamed;
    ~A() { if (TestBit(BIT(14)) delete fNamed; }
    void SetName(const char *name)
    { fNamed = new TNamed(name, ""); SetBit(BIT(14)); }
    vodi SetName(TNamed *name) { fNamed = name; ResetBit(BIT(14)); }
    ClassDef(A, 1)
}

and now I create an instance of this class
A a, b;
a.SetName(new TNamed);
b.SetName("NewName");

and write both objects to a file:
a.Write("Obj1");
b.Write("Obj2");

now I read this object into new objects:
A c,d;
c.Read("Obj1");
d.Read("Obj2");

As I understand it, now both objects (c and d) have a newly allocated 
TNamed. But for one of the two objects BIT(14) is set and for one not. 
How can I make sure, that the destruction of the TNamed-data-member is 
done correctly in any case?

Thanks in advance,
Thomas.

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