TimeSlot calib allow multiple inputs for process()

And per default make the container type the same as the input type.
Useful in case the object send to the aggregator is in itself already
a container as for example a histogram.

Author: martenole

Detectors/Calibration/include/DetectorsCalibration/TimeSlotCalibration.h

@@ -36,7 +36,7 @@ class ProcessingContext;
 namespace calibration
 {
 
-template <typename Input, typename Container>
+template <typename Input, typename Container = Input>
 class TimeSlotCalibration
 {
  public:
@@ -104,8 +104,8 @@ class TimeSlotCalibration
   const Slot& getLastSlot() const { return (Slot&)mSlots.back(); }
   const Slot& getFirstSlot() const { return (Slot&)mSlots.front(); }
 
-  template <typename DATA>
-  bool process(const DATA& data);
+  template <typename... DATA>
+  bool process(const DATA&... data);
   virtual void checkSlotsToFinalize(TFType tf, int maxDelay = 0);
   virtual void finalizeOldestSlot();
 
@@ -227,8 +227,8 @@ class TimeSlotCalibration
 
 //_________________________________________________
 template <typename Input, typename Container>
-template <typename DATA>
-bool TimeSlotCalibration<Input, Container>::process(const DATA& data)
+template <typename... DATA>
+bool TimeSlotCalibration<Input, Container>::process(const DATA&... data)
 {
   static bool firstCall = true;
   if (firstCall) {
@@ -251,10 +251,10 @@ bool TimeSlotCalibration<Input, Container>::process(const DATA& data)
   }
   auto& slotTF = getSlotForTF(tf);
   using Cont_t = typename std::remove_pointer<decltype(slotTF.getContainer())>::type;
-  if constexpr (has_fill_method<Cont_t, void(const o2::dataformats::TFIDInfo&, const DATA&)>::value) {
-    slotTF.getContainer()->fill(mCurrentTFInfo, data);
+  if constexpr (has_fill_method<Cont_t, void(const o2::dataformats::TFIDInfo&, const DATA&...)>::value) {
+    slotTF.getContainer()->fill(mCurrentTFInfo, data...);
   } else {
-    slotTF.getContainer()->fill(data);
+    slotTF.getContainer()->fill(data...);
   }
   if (tf > mMaxSeenTF) {
     mMaxSeenTF = tf; // keep track of the most recent TF processed