GetComponents.h

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#ifndef GsfToolsGetComponents_H
#define GsfToolsGetComponents_H
#include "TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h"
struct GetComponents {
  explicit GetComponents(TrajectoryStateOnSurface const &tsos) : comps(&single) {
    if (tsos.singleState())
      single.push_back(tsos);
    else
      comps = &tsos.components();
  }
  TrajectoryStateOnSurface::Components const &operator()() const { return *comps; }

  TrajectoryStateOnSurface::Components single;
  TrajectoryStateOnSurface::Components const *comps;
};
#endif