Static_assert check for hit property space

sawenzel · sawenzel · commit fe58ccbb9485 · 2023-09-11T16:02:23.000+02:00
Need to check if data-layout compatible with number
of detectors. Important in view of ALICE3 extensions etc.
diff --git a/DataFormats/simulation/include/SimulationDataFormat/MCTrack.h b/DataFormats/simulation/include/SimulationDataFormat/MCTrack.h
@@ -27,6 +27,7 @@
 #include "TParticle.h"
 #include "TParticlePDG.h"
 #include "TVector3.h"
+#include <type_traits>
 
 namespace o2
 {
@@ -261,6 +262,7 @@ class MCTrackT
       int storage : 1;  // encoding whether to store this track to the output
       unsigned int process : 6; // encoding process that created this track (enough to store TMCProcess from ROOT)
       int hitmask : 22;         // encoding hits per detector
+      static_assert(o2::detectors::DetID::nDetectors <= 22); // ensure that all known detectors can be encoded here by a bit
       int reserved1 : 1;        // bit reserved for possible future purposes
       int inhibited : 1; // whether tracking of this was inhibited
       int toBeDone : 1; // whether this (still) needs tracking --> we might more complete information to cover full ParticleStatus space
