Ok, if I replace "right" by "fred" or "potato" it works.
I suppose I should have known better. (But "right" did
work in previous root versions; oh well.)
thanks
Robert
On Wed, 14 Apr 2004, Rene Brun wrote:
> Hi Robert,
>
> The keywords "left" and "right" are manipulators used by C++ iostream
> see: http://www.cplusplus.com/ref/iostream/ios_base/_internal_left_right.html
>
> Rene Brun
>
> Robert Michaels wrote:
> >
> > Using ROOT 3.10/02 compiled with gcc 3.2.3 on a RHEL 3WS.
> > The following example illustrates my problem. It is minor
> > but I am wondering why this occured for this newer version
> > of root ? For some earlier versions of root it was not a
> > problem. Is it a new bug ?
> >
> > thanks
> > Robert Michaels
> > Jefferson Lab
> >
> > {
> > // This macro: tsimple.C
> > //
> > // Why in this example must I have "R" instead
> > // of "right" as the 1st argument of TTree ?
> > // right->Print`() fails
> > // but if I replace "right" by "R", then
> > // R->Print() succeeds
> >
> > // This problem occurs on a RH enterprise 3WS
> > // with ROOT version 3.10/02 compiled with gcc 3.2.3
> > // kernel 2.4.21-9.0.1.EL
> > //
> > // Most relevant is ROOT version, since 3.05/07
> > // compiled with same compiler on same system
> > // right->Print() works fine.
> > // Some earlier versions also work (3.02/07, 3.03/06).
> >
> > gROOT->Reset();
> >
> > Double_t px, py, ev, bb;
> > Int_t kout = 5000;
> >
> > TFile *hfile = new TFile("t.root","RECREATE","Demo");
> >
> > // The following works ok -- can do "R->Print()"
> > // TTree *tree = new TTree("R","simple tree");
> >
> > // But this does not work:
> > TTree *tree = new TTree("right","simple tree");
> >
> > // Failure:
> > // root [0] .x tsimple.C
> > // root [1] right->Print()
> > //Error: non class,struct,union object right used with . or -> FILE:(tmpfile) LINE:1
> > //*** Interpreter error recovered ***
> > // So you must:
> > // root [2] TTree *R = (TTree*)gROOT.FindObject("right")
> > // root [3] R->Print()
> > // (no error now)
> >
> > tree->Branch("px",&px,"px/D",kout);
> > tree->Branch("py",&py,"py/D",kout);
> > tree->Branch("ev",&ev,"ev/D",kout);
> > tree->Branch("bb",&bb,"bb/D",kout);
> >
> >
> > // Fill tree randomly
> > gRandom->SetSeed();
> >
> > for (Int_t i = 0; i < 5000; i++) {
> > gRandom->Rannor(px,py);
> > ev = ev+1;
> > bb = 40*ev+1000;
> > tree->Fill();
> > }
> >
> > tree->Write();
> >
> > }
>
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