TRD: Benefit from custom streamer for labels (#3068)

* use standard MCCompLabel for TRD
* generalize MCCompLabel constructor
* benefit from custom streamer for MCTruthContainer for TRD

fixed https://alice.its.cern.ch/jira/browse/O2-1213

Author: sawenzel

DataFormats/simulation/include/SimulationDataFormat/MCCompLabel.h

@@ -49,7 +49,7 @@ class MCCompLabel
   // mask for all used fields
   static constexpr ULong64_t maskFull = (ul0x1 << (nbitsTrackID + nbitsEvID + nbitsSrcID)) - 1;
 
-  MCCompLabel(int trackID, int evID, int srcID, bool fake) { set(trackID, evID, srcID, fake); }
+  MCCompLabel(int trackID, int evID, int srcID, bool fake = false) { set(trackID, evID, srcID, fake); }
   MCCompLabel(bool noise = false)
   {
     if (noise) {

Detectors/TRD/base/include/TRDBase/MCLabel.h

@@ -19,17 +19,7 @@ namespace o2
 {
 namespace trd
 {
-
-class MCLabel : public o2::MCCompLabel
-{
- public:
-  MCLabel() = default;
-  MCLabel(int trackID, int eventID, int srcID)
-    : o2::MCCompLabel(trackID, eventID, srcID, false) {}
-
-  ClassDefNV(MCLabel, 1);
-};
-
+using MCLabel = o2::MCCompLabel;
 } // namespace trd
 } // namespace o2
 

Detectors/TRD/base/src/TRDBaseLinkDef.h

@@ -25,7 +25,6 @@
 #pragma link C++ class o2::trd::CalDet + ;
 #pragma link C++ class o2::trd::CalROC + ;
 #pragma link C++ class o2::trd::PadResponse + ;
-#pragma link C++ class o2::trd::MCLabel + ;
 #pragma link C++ class o2::trd::PadParameters < unsigned short > +;
 #pragma link C++ class o2::trd::PadParameters < float > +;
 #pragma link C++ class o2::trd::PadParameters < char > +;
@@ -46,6 +45,4 @@
 
 #include "SimulationDataFormat/MCTruthContainer.h"
 
-#pragma link C++ class o2::dataformats::MCTruthContainer < o2::trd::MCLabel> + ;
-
 #endif

macro/analyzeDigitLabels.C

@@ -245,7 +245,7 @@ void analyzeTOF(TTree* reftree)
 void analyzeTRD(TTree* reftree)
 {
   LabelStats result;
-  analyse<o2::trd::MCLabel>(reftree, "TRDMCLabels", result);
+  analyse<o2::MCCompLabel>(reftree, "TRDMCLabels", result);
   std::cout << gPrefix << " TRD ";
   result.print();
 }