Rene Brun wrote: > Hi David, > > Which version are you using ? I am a little late : 3.03/02 > I cannot reproduce this problem. > Your program works OK for me. I apologize. The example I posted was a little simplified as compared to the real one, and I just checked that this simplified version also works for me ! I did some additionnal tests so to extract the minimal program which crash, and attached it below. As a summary, the program crash when I store a single RtObj<TString> before the array. > Note that to store a string in a TObjArray or any other ROOT container, > you can use the class TObjString. I use TString only for the program which demonstrates the crash. In real life, I instanciate RtObj with more complex existing classes which do not inherit from TObject and which I cannot modify directly. > > > =================================================== > > the file with the template > > =================================================== > > > > #include <TObject.h> > > > > template <class T> > > class RtObj : public TObject, public T > > { > > public: > > RtObj() {} > > RtObj( const T & val ) : T(val) {} > > ClassDefT(RtObj,1) > > } ; > > > > ClassDefT2(RtObj,T) > > > > ClassImpT(RtObj,T) > > > > =================================================== > > the linkdef file > > =================================================== > > > > #ifdef __CINT__ > > > > #pragma link off all globals; > > #pragma link off all classes; > > #pragma link off all functions; > > > > #pragma link C++ class RtObj<TString>+; > > > > #endif > > > > ==================================================== The new main file ==================================================== #include <TObjArray.h> #include <TString.h> #include <TROOT.h> #include <TFile.h> #include <iostream> int main() { // begin TROOT rdummy("dummy","dummy") ; TFile * file ; // write file = new TFile("Temp.root","recreate") ; RtObj<TString> obj("hello") ; obj.Write("obj") ; TObjArray array ; array.AddLast( new RtObj<TString>("world") ) ; array.Write("array",TObject::kSingleKey) ; file->Close() ; delete file ; // read file = new TFile("Temp.root","read") ; RtObj<TString> * pobj = (RtObj<TString> *)(file->Get("obj")) ; cout<<*pobj<<endl ; TObjArray * parray = (TObjArray *)(file->Get("array")) ; cout<<*((RtObj<TString> *)((*parray)[0]))<<endl ; file->Close() ; delete file ; // end return 0 ; }
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