There is a default TObjArray ctor. Look good :-)
(Hint: a ctor where all arguments have defaults is a default ctor).
Why not try gcc 2.9x instead of 2.8.x
Cheers, Fons.
On Thu, Mar 16, 2000 at 08:45:27AM +0100, Damir Buskulic wrote:
> Hi Victor,
>
> My example worked perfectly until a few days ago when I tried to port it
> to gcc2.8.1.
> I do not see why there is no default constructor in the TObjArray class.
> I thought this was necessary for streaming.
>
> Damir
>
> Victor Perevoztchikov wrote:
> >
> > Hi Damir,
> > I do not see anything wrong in your example.
> > But if you will use TObjArray of TObjArray's then you will not need
> > special Streamer at all.
> >
> > Victor
> >
> > Damir Buskulic wrote:
> > >
> > > Hi,
> > >
> > > I have an array of TObjArrays that I want to stream. When I read the
> > > objects back, I have an error :
> > >
> > > Error in <TClass::New>: no default ctor for class TObjArray
> > > Error in <TBuffer::ReadObject>: could not create object of class
> > > TObjArray
> > > Warning in <TExMap::Remove>: key 2560 not found at 45
> > > Warning in <TBuffer::CheckObject>: reference to object of unavailable
> > > class TObjArray, pointer will be 0
> > >
> > > Program received signal SIGSEGV, Segmentation fault.
> > >
> > > This happens in the streamer of a class, here is the excerpt of the
> > > Streamer that does the job :
> > >
> > > mFDNames = new TObjArray* [mCapacity];
> > > memset(mFDNames, 0, mCapacity*sizeof(TObjArray*));
> > > TObjArray* obj;
> > > for (Int_t i=0; i<mCapacity;i++) {
> > > R__b >> obj;
> > > if (obj) mFDNames[i] = obj;
> > > }
> > >
> > > It happens only on Alpha with gcc 2.8.1, but works fine on Alpha/egcs
> > > and LinuxPPC/egcs. What does this mean ? Should I do something special
> > > before R__b>>obj ?
> > >
> > > Cheers
> > >
> > > Damir
> > > --
> > > =====================================================================
> > > | Damir Buskulic | Universite de Savoie/LAPP |
> > > | | Chemin de Bellevue, B.P. 110 |
> > > | Tel : +33 (0)450091600 | F-74941 Annecy-le-Vieux Cedex |
> > > | e-mail: buskulic@lapp.in2p3.fr | FRANCE |
> > > =====================================================================
> > > mailto:buskulic@lapp.in2p3.fr
> >
> > --
> > 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
>
> --
> =====================================================================
> | Damir Buskulic | Universite de Savoie/LAPP |
> | | Chemin de Bellevue, B.P. 110 |
> | Tel : +33 (0)450091600 | F-74941 Annecy-le-Vieux Cedex |
> | e-mail: buskulic@lapp.in2p3.fr | FRANCE |
> =====================================================================
> mailto:buskulic@lapp.in2p3.fr
--
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