Replace some functions with templates in MCTruthClassifier

Replace some functions with templates in MCTruthClassifier

PhysicsAnalysis/MCTruthClassifier/MCTruthClassifier/MCTruthClassifier.h

@@ -223,9 +223,9 @@ private:
 #ifndef GENERATIONBASE /*Disable when no recostruction packages are expected*/
   double fracParticleInJet(const xAOD::TruthParticle*, const xAOD::Jet*, bool DR, bool nparts) const;
   void findJetConstituents(const xAOD::Jet*, std::set<const xAOD::TruthParticle*>& constituents, bool DR) const;
-  static double deltaR(const xAOD::TruthParticle& v1, const xAOD::Jet& v2);
-  //
 #endif
+  // Now that we use TLorentzVector for the momentum base class, this is straightforward
+  template <class A, class B> inline double deltaR(A& v1, B& v2) const {return v1.p4().DeltaR(v2.p4());}
 
   void findAllJetMothers(const xAOD::TruthParticle*, std::set<const xAOD::TruthParticle*>&) const;
   void findParticleDaughters(const xAOD::TruthParticle*, std::set<const xAOD::TruthParticle*>&) const;

PhysicsAnalysis/MCTruthClassifier/Root/MCRecoToTruth.cxx

@@ -387,13 +387,7 @@ MCTruthClassifier::getGenPart(const xAOD::TrackParticle* trk, Info* info /*= nul
   return (theGenParticle);
 }
 
-// Now that we use TLorentzVector for the momentum base class, this is straightforward
-double
-MCTruthClassifier::deltaR(const xAOD::TruthParticle& v1, const xAOD::Jet& v2)
-{
-  // Should this use delta y though?
-  return v1.p4().DeltaR(v2.p4());
-}
+
 void
 MCTruthClassifier::findJetConstituents(const xAOD::Jet* jet,
                                        std::set<const xAOD::TruthParticle*>& constituents,