/usr/include/root/TFriendElement.h is in libroot-tree-dev 5.34.14-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Author: Rene Brun 07/04/2001
/*************************************************************************
* Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
#ifndef ROOT_TFriendElement
#define ROOT_TFriendElement
//////////////////////////////////////////////////////////////////////////
// //
// TFriendElement //
// //
// A TFriendElement TF describes a TTree object TF in a file. //
// When a TFriendElement TF is added to the the list of friends of an //
// existing TTree T, any variable from TF can be referenced in a query //
// to T. //
// //
//////////////////////////////////////////////////////////////////////////
#ifndef ROOT_TNamed
#include "TNamed.h"
#endif
class TFile;
class TTree;
class TClass;
class TFriendElement : public TNamed {
protected:
TTree *fParentTree; //!pointer to the parent TTree
TTree *fTree; //!pointer to the TTree described by this element
TFile *fFile; //!pointer to the file containing the friend TTree
TString fTreeName; // name of the friend TTree
Bool_t fOwnFile; // true if file is managed by this class
TFriendElement(const TFriendElement&);
TFriendElement& operator=(const TFriendElement&);
public:
enum { kFromChain = BIT(11) };
TFriendElement();
TFriendElement(TTree *tree, const char *treename, const char *filename);
TFriendElement(TTree *tree, const char *treename, TFile *file);
TFriendElement(TTree *tree, TTree* friendtree, const char *alias);
virtual ~TFriendElement();
virtual TTree *Connect();
virtual TTree *DisConnect();
virtual TFile *GetFile();
virtual TTree *GetParentTree() const {return fParentTree;}
virtual TTree *GetTree();
virtual const char *GetTreeName() const {return fTreeName.Data();}
virtual void ls(Option_t *option="") const;
ClassDef(TFriendElement,2) //A friend element of another TTree
};
#endif
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