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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