Hello You must treat that warning message as your error to be fixed. If you want your own method Clear you still have to provide an implmentation of the "base" Clear. I mean your header file must look as follows: class TANA : public TObject { public: void Clear(Option_t *opt){ TObject::Clear(opt);} // This is to preserve TObject::Clear void Clear(); // This is a prototype for your own Clear. }; If what you want is overloading of the very TObject::Clear then the signature of your method and TObject::Clear must match. I.e. you need class TANA : public TObject { public: void Clear(Option_t *opt=''): // This is prototype for your own overloading Clear }; Hope this helps, Valeri ----- Dr.Valeri Fine STAR/US Atlas E-mail: fine@bnl.gov Brookhaven National Lab Phone: +1 631 344 7806 Upton, NY 11973-5000 FAX: +1 631 344 4206 USA ----- Original Message ----- From: "Elena Vataga" <vataga@fnal.gov> To: "Rene Brun" <Rene.Brun@cern.ch> Cc: <roottalk@pcroot.cern.ch> Sent: Friday, February 15, 2002 5:47 AM Subject: [ROOT] How to write destructor? > > > Hello! > > Sorry for very naive question. > > I wrote class with my analysis variables which > inherit from TObject class and contains > several TClonesArray* Electrons, Muons, Jets etc . > > When trying to put in destructor > Electrons->Clear(); > I am getting warning message: > > function "TObject::Clear(Option_t *)" is hidden by "TANA::Clear" > -- virtual function override intended? > void Clear(); > > > Shell I just leave destructor vote? > Or shell I use > Electrons->Delete() > in TANA::~TANA ? > > Thank you in advance, > Elena > >
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