Re: [ROOT] Multiple inheritance from TObject problem/ old cutoms class read/write problem

From: Victor Perevoztchikov (perev@bnl.gov)
Date: Wed Jan 23 2002 - 17:56:59 MET 

Hi Joe,

> Class B:public A,TObject
you should never use such kind of inheritance, if you want to use
I/O or CINT.
The correct one is:

Class B: public TObject,A

Victor


joer00@bellsouth.net wrote:
> 
> Rene,
> 
> just to be 100 % sure now, from you posts this should work: (if yes just asnwer yes to save time, if no please explain because it than cotradicts with your provious posts !)
> 
> Class A does NOT deriver from TObject, does NOT define the ClassDef macros and has NO streamer. It HAS datamemebers which I do NOT want/need to write to disk.
> 
> Class B:public A,TObject
> 
> DOES deriver from TObject, DOES implement ClassDef, HAS a dictionary file,HAS data members which need to be written to disk.
> 
> BObject->Write("NAME"); and
> BObject=(B*)SomeFile->Get("Name");
> 
>  WILL work although base class does NOT deriver from TObject and has no streamer !
> 
> Joe

-- 
Victor M. Perevoztchikov   perev@bnl.gov  perev@vxcern.cern.ch       
Brookhaven National Laboratory MS 510A PO Box 5000 Upton NY 11973-5000
tel office : 631-344-7894; fax 631-344-4206; home 631-345-2690

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