Hi David,
I have no problems executing you small test program. I do:
rootcint -f cint.cxx -c RtObj.h LinkDef.h
g++ -fPIC -I$ROOTSYS/include -c cint.cxx mytest.cxx
g++ -o mytest mytest.o cint.o `root-config --glibs`
running mytest produces the two output lines (as expected):
hello
world
I take this opportunity to remind people that the old statement like
in your code:
TROOT rdummy("dummy","dummy") ;
and the corresponding
#include <TROOT.h>
are not necessary since with introduced version 3.0
Rene Brun
David Chamont wrote:
>
> 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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