Hi Ingo,
If you use version 2.25/03, you can instruct Root to ignore
the TObject part of a class in a TClonesArray in two ways:
- specify split=2 when you create the branch with the TClonesArray
eg. tree->Branch("Kinematics", "H1LtKine", &fKine, 16000, 2)
- if TClonesArray *clones, you can do
clones->SetBit(TClonesArray::kForgetBits);
In version 3.00, I have generalized this possibility to all branches
in split or no-split mode. You can instruct a class Myclass deriving
from TObject to ignore the TObject part when streaming to the file.
MyClass::Class()->IgnoreTObjectStreamer();
Concerning the supported options in the comment field of the data members,
see http://root.cern.ch/root/SchemaEvolution.html
Rene Brun
On Thu, 28 Dec 2000, Ingo Strauch wrote:
> Ho ROOTers!
>
> Where can I find a list of all possible "options" to give in a class
> definition?
>
> For example I know that I have to use
>
> Int_t fUseless; //!
>
> if I don't want to stream this datamember. But what other things can I do?
>
> My other problem (using ROOT 2.25/03) is that I want to write single
> objects (in splitmode) in a tree without the fBits and fUniqueID. Some
> objects have other objects which again have fBits and fUniqueID. This
> totals to 100 branches just for those variables I don't need.
>
> This is what I do:
>
> tree->Branch("Kinematics", "H1LtKine", &fKine, 16000, 1)
> ...
>
> Is there a way to not create branches for fBits and fUniqueID?
>
> Cheers,
> Ingo
>
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