/data/refman/pasoursint/CMSSW_5_3_1/src/DataFormats/Common/interface/getRef.h

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#ifndef DataFormats_Common_getRef_h
#define DataFormats_Common_getRef_h
/* \function edm::getRef(...)
 *
 * \author Luca Lista, INFN
 *
 */
#include "DataFormats/Common/interface/Ref.h"
#include "DataFormats/Common/interface/View.h"
#include "DataFormats/Common/interface/Handle.h"

namespace edm {
  namespace helper {
    template<typename C>
    struct MatcherGetRef {
      typedef Ref<C> ref_type;
      static ref_type getRef( const Handle<C> & c, size_t k ) { return ref_type(c, k); }
    };
    
    template<typename T>
    struct MatcherGetRef<View<T> > {
      typedef RefToBase<T> ref_type;
      static ref_type getRef( const Handle<View<T> > & v, size_t k ) { return v->refAt(k); }
    };
  }
  
  template<typename C> 
  typename helper::MatcherGetRef<C>::ref_type getRef( const Handle<C> & c, size_t k ) { 
    return helper::MatcherGetRef<C>::getRef( c, k ); 
  }
}

#endif