*** Robert Casties wrote : > > Hello! > > I've tried for some time now to create objects in CINT which can be put in > TTrees, but it didn't work out. Is there some general limitation on doing > that? Do strameable objects have to be compiled? > > I derived my objects from TObject, used ClassDef and ClassImp macros > (copied from Rtypes.h because of the #include problem) and Streamer > methods created by rootcint. > > If I load my files with ".L" I can use the classes and see the > descriptions with ".class". But if I add a branch to a tree with: > myTree->Branch("mybranch", "TmyClass", &gMyClass, 320000, 0); > then it is not visible (branch name is empty) with TTree::Print and > TTree::Write causes a segfault. > > The same works fine with ROOTs compiled classes. > > I can give more details if needed. (System used: 1.03/03 on Linux) > > Thanks > Robert > > Hi Robert, Quite some time ago I encountered the same problem and the ROOT team indeed told me that this is ONLY possible for compiled classes for the moment. I was told by Valery that it has something to do with the fact that CINT has to know some address table for your classes, which differ for each compiler and each platform. However, Rene told me that people (I assume Masa) are working on it. It indeed would be nice to have all this functionality also for interactively loaded macros, since it would make testing a lot more easy (now one has to compile and link (or create shared lib) before one can try things out where I/O is involved). Cheers, Nick. *----------------------------------------------------------------------* Dr. Nick van Eijndhoven Department of Subatomic Physics email : nick@fys.ruu.nl Utrecht University / NIKHEF tel. +31-30-2532331 (direct) P.O. Box 80.000 tel. +31-30-2531492 (secr.) NL-3508 TA Utrecht fax. +31-30-2518689 The Netherlands WWW : http://www.fys.ruu.nl/~nick Office : Ornstein lab. 172 ---------------------------------------------------------------------- tel. +41-22-7679751 (direct) CERN PPE Division / ALICE exp. tel. +41-22-7675857 (secr.) CH-1211 Geneva 23 fax. +41-22-7679480 Switzerland CERN beep : 13+7294 Office : B 160 1-012 *----------------------------------------------------------------------*
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