supportsThinning.h

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// This file's extension implies that it's C, but it's really -*- C++ -*-.
/*
   Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
 */
 
 
#ifndef ATHCONTAINERS_SUPPORTSTHINNING_H
#define ATHCONTAINERS_SUPPORTSTHINNING_H
 
 
#include "AthContainers/AuxVectorBase.h"
#include "AthContainers/AuxElement.h"
#include "AthContainersInterfaces/IAuxStore.h"
#include <type_traits>
 
 
namespace SG {
 

template <class T>
bool constexpr xAODInterfaceSupportingThinning () {
 
  constexpr bool isxAODInterfaceObject =
    std::derived_from<T, SG::AuxVectorBase> ||
    std::derived_from<T, SG::AuxElement>;
 
  if constexpr (isxAODInterfaceObject)
    return T::supportsThinning;
  else
    return false;
}
 

template <class T>
inline constexpr bool is_xAODStoreObject_v =
  std::is_base_of_v<SG::IAuxStore, T>;
template <class T,
          typename std::enable_if_t<is_xAODStoreObject_v<T> >* = nullptr>
bool constexpr xAODStoreSupportingThinning () { return T::supportsThinning; }
template <class T,
          typename std::enable_if_t<!is_xAODStoreObject_v<T> >* = nullptr>
bool constexpr xAODStoreSupportingThinning () { return false; }
 
 
} // namespace SG
 
 
#endif // not ATHCONTAINERS_SUPPORTSTHINNING_H