Problem to fill Tree branch with vector of a structure

ROOT
1

I am trying to fill the tree branch with a vector of a user defined structure as :

/// bar.hxx
typedef struct bar{
int id, type, charge;
}bar;
vector hit;

/// bar.cxx
… filling the “vector hit” for each event. works.

but filling the tree with the vector is not working:
tree->Branch(“bar”,“vector”,&hit);
tree->Fill();

It’s not showing any compilation error, but runtime error. I know it’s probably not the way I should be filling the tree.
Suggestion please.

2

[quote]It’s not showing any compilation error, but runtime error.[/quote]What is the runtime error? Most likely you did not generate the dictionary for vector.

Philippe.

3

It’s not showing any compilation error, but runtime error.What is the runtime error? Most likely you did not generate the dictionary for vector.

Philippe.

Error is :
Error in TTree::Branch: The class requested (vector) for the branch “bar” refer to an stl collection and do not have a compiled CollectionProxy. Please generate the dictionary for this class (vector)

I tried doing :
#include
#ifdef MAKECINT
#pragma link C++ class bar+;
#endif

But bar is not defined as class type. So I get,

Error: link requested for unknown class BarHit /Users/analysis/ana/v0r0/src/loader.C:3:
Warning: Error occurred during reading source files
Warning: Error occurred during dictionary source generation
!!!Removing /Users/analysis/ana/v0r0/src/loader_C_ACLiC_dict.cxx /Users/analysis/ana/v0r0/src/loader_C_ACLiC_dict.h !!!
Error: /Users/work/ROOT/v5r28p00n01/Darwin/bin/rootcint: error loading headers…
Error in : Dictionary generation failed!
Info in : Invoking compiler to check macro’s validity
Info in : The compiler has not found any problem with your macro.
Probably your macro uses something rootcint can’t parse.

4

Hi,

The linkdef part would need to look like: #include <vector> #ifdef __MAKECINT__ #pragma link C++ class bar+; #pragma link C++ class vector<bar>+; #endifand loader.C would need to also include the header file for bar …

Cheers,
Philippe.

5

My code :
////////////bar.hxx
…
#include “loader.C”
…

typedef struct bar{
int id, type, charge;
}bar;
class ReconCluster:public EventLoopFunction{
private:
TTree fTree;
vector hit;
public:
ReconCluster(){};
virtual ~ReconCluster() {};
void Clear();
void Initialize();
bool operator()(Event&);
void Finalize();
void GetBarHits(Event&, vector);
};

/////////////////bar.cxx
int main(int argc, char **argv)
{
gROOT->ProcessLine(".L /Users/analysis/ana/v0r0/include/loader.C+");
ReconCluster myCode;
EventLoop(argc,argv,myCode);
return 0;
}
void ReconCluster::Initialize(){
fTree = new TTree(“tr”,“Cluster Tree”);
fTree->Branch(“bar”,“vector”,&hit);
}
void ReconCluster::Clear(){
hit.clear();
}
bool ReconCluster::operator()(Event& ev)
{
GetBarHits(ev,&hit);
fTree->Fill();
Clear();
return;
}
void ReconCluster::Finalize(){
outfile= new TFile (“output.root”,“recreate”);
fTree->Write();
outfile->Close();
}

///////////// loader.C
#include
#ifdef MAKECINT
#pragma link C++ class bar+;
#pragma link C++ class vector+;
#endif

/////Compilation : make -> NO error
//// Runtime : …/Darwin/clst_f.exe …/input/500MeV0degmu.root
Info in TUnixSystem::ACLiC: creating shared library /Users/analysis/ana/v0r0/include/loader_C.so
Error: link requested for unknown class bar /Users/analysis/ana/v0r0/include/loader.C:6:
Error: class,struct,union or type bar not defined /Users/work/ROOT/v5r28p00n01/Darwin/lib/root/cint/cint/lib/prec_stl/memory:37:
Error: class,struct,union or type bar not defined /Users/work/ROOT/v5r28p00n01/Darwin/lib/root/cint/cint/lib/prec_stl/memory:38:
Error: class,struct,union or type bar not defined /Users/work/ROOT/v5r28p00n01/Darwin/lib/root/cint/cint/lib/prec_stl/memory:43:
Error: class,struct,union or type bar not defined /Users/work/ROOT/v5r28p00n01/Darwin/lib/root/cint/cint/lib/prec_stl/memory:44:
Error: class,struct,union or type bar not defined /Users/work/ROOT/v5r28p00n01/Darwin/lib/root/cint/cint/lib/prec_stl/memory:45:
Error: class,struct,union or type bar not defined /Users/work/ROOT/v5r28p00n01/Darwin/lib/root/cint/cint/lib/prec_stl/vector:51:
Error: Function bar() is not defined in current scope /Users/work/ROOT/v5r28p00n01/Darwin/lib/root/cint/cint/lib/prec_stl/vector:442:
Error: Function bar() is not defined in current scope /Users/work/ROOT/v5r28p00n01/Darwin/lib/root/cint/cint/lib/prec_stl/vector:442:
Error: Syntax error /Users/work/ROOT/v5r28p00n01/Darwin/lib/root/cint/cint/lib/prec_stl/vector:522:
Error: void type variable can not be declared /Users/work/ROOT/v5r28p00n01/Darwin/lib/root/cint/cint/lib/prec_stl/vector:522:
Warning: Error occurred during reading source files
Warning: Error occurred during dictionary source generation
!!!Removing /Users/analysis/ana/v0r0/include/loader_C_ACLiC_dict.cxx /Users/analysis/ana/v0r0/include/loader_C_ACLiC_dict.h !!!
Error: /Users/work/ROOT/v5r28p00n01/Darwin/bin/rootcint: error loading headers…
Error in : Dictionary generation failed!
Info in : Invoking compiler to check macro’s validity
Info in : The compiler has not found any problem with your macro.
Probably your macro uses something rootcint can’t parse.
Check root.cern.ch/root/Cint.phtml?limitations for Cint’s limitations.
Error in TTree::Branch: The class requested (vector) for the branch “bar” refer to an stl collection and do not have a compiled CollectionProxy. Please generate the dictionary for this class (vector)

Hi,

The linkdef part would need to look like:
#include
#ifdef MAKECINT
#pragma link C++ class bar+;
#pragma link C++ class vector+;
#endif
and loader.C would need to also include the header file for bar …

Cheers,
Philippe.

6

Hi,

There is some confusion in where the #include should be. Here is a version of your file that should work:

[code]////////////bar.hxx
// Do no include loader.C.
#include
#include “EventLoopFunction.h”
#include “TTree.h”

typedef struct bar {
int id, type, charge;
} bar; // Note that ‘typedef struct bar {…} bar;’ is a C syntax, in C++ you write 'struct bar { … };'
class ReconCluster:public EventLoopFunction{
private:
TTree fTree;
vector hit;
public:
ReconCluster(){};
virtual ~ReconCluster() {};
void Clear();
void Initialize();
bool operator()(Event&);
void Finalize();
void GetBarHits(Event&, vector);
};[/code]

[code]
/////////////////bar.cxx
#include “bar.hxx”
#include “TROOT.h”

int main(int argc, char **argv)
{
gROOT->ProcessLine(".L /Users/analysis/ana/v0r0/include/loader.C+");
ReconCluster myCode;
EventLoop(argc,argv,myCode);
return 0;
}
…[/code]

// Loader.C
#include "bar.h"
#include <vector>

#ifdef __MAKECINT__
#pragma link C++ class bar+;
#pragma link C++ class vector<bar>+;
#endif

Cheers,
Philippe.

7

Thank you very much.
Problem solved.