TempMeasurements.h

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#ifndef Tracking_TempMeasurements_H
#define Tracking_TempMeasurements_H
#include "TrackingTools/TransientTrackingRecHit/interface/TransientTrackingRecHit.h"
#include "FWCore/Utilities/interface/GCC11Compatibility.h"

#include<vector>
#include<algorithm>

namespace tracking {
  // the return type from a MeasurementDet
  struct TempMeasurements {
    typedef TrackingRecHit::ConstRecHitContainer        RecHitContainer;
    typedef TrackingRecHit::ConstRecHitPointer    ConstRecHitPointer;
    typedef std::vector<float> Distances;

    void clear() { hits.clear(); distances.clear();}
    bool empty() const {return hits.empty();}
    std::size_t size() const { return hits.size();}

    inline void sortIndex(int * index) const {
      float const * d = &distances.front(); // do not trust capture
      for (std::size_t i=0; i!=size(); ++i) {
    index[i]=i; 
    std::push_heap(index,index+i+1,[d](int j,int k){return d[j]<d[k];});
      }
      std::make_heap(index,index+size(),[d](int j,int k){return d[j]<d[k];});
    }

    void add(ConstRecHitPointer const & h, float d)  {
      hits.push_back(h); distances.push_back(d);
    }
    void add(ConstRecHitPointer && h, float d)  {
      hits.push_back(std::move(h)); distances.push_back(d);
    }


    RecHitContainer hits;
    Distances distances;

  };
}


#endif // Tracking_TempMeas_H