AthToolSupport/AsgTools/AsgTools/SlotSpecificObj.h

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/*
 * Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration.
 */

 
#ifndef ASGTOOLS_SLOTSPECIFICOBJ_H
#define ASGTOOLS_SLOTSPECIFICOBJ_H
 
#ifndef XAOD_STANDALONE
#   include "AthenaKernel/SlotSpecificObj.h"
#else
 
#include <array>
#include <string>
 
class EventContext; 
 
namespace SG {

template <class T>
class SlotSpecificObj
{
public:
  SlotSpecificObj() = default;
  SlotSpecificObj (size_t /*nslots*/) : SlotSpecificObj() {}

  T* get (const EventContext&) { return get(); }
  T* get() { return &m_slots[0]; }
  const T* get (const EventContext&) const { return get(); }
  const T* get() const { return &m_slots[0]; }

  T& operator* ()              { return *get(); }
  const T& operator* () const  { return *get(); }
  T* operator-> ()             { return get(); }
  const T* operator-> () const { return get(); }

  typedef typename std::array<T,1>::iterator iterator;
  typedef typename std::array<T,1>::const_iterator const_iterator;
  typedef typename std::array<T,1>::value_type value_type;
 
  iterator begin()             { return m_slots.begin(); }
  const_iterator begin() const { return m_slots.begin(); }
  iterator end()               { return m_slots.end(); }
  const_iterator end() const   { return m_slots.end(); }
 
private:
  std::array<T,1> m_slots{};
};
 
} // namespace SG
 
#endif // XAOD_STANDALONE
#endif // ASGTOOLS_SLOTSPECIFICOBJ_H