AuxStore_traits.h

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// This file's extension implies that it's C, but it's really -*- C++ -*-.
 
/*
  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
*/

 
 
#ifndef ATHCONTAINERSINTERFACES_AUXSTORE_TRAITS_H
#define ATHCONTAINERSINTERFACES_AUXSTORE_TRAITS_H
 
 
#include "AthContainersInterfaces/IAuxElement.h"
#include "AthContainersInterfaces/IAuxStore.h"
#include "AthContainersInterfaces/IConstAuxStore.h"
 
 
# include <type_traits>
#include <string>
 
 
 
namespace SG {
 

class NoAuxStore {};
 

struct AuxStore_traits_AuxDefault
{
  typedef std::true_type flag;
 
  typedef IAuxStore type;
  static const std::string& typeName()
  { 
    static const std::string name ("SG::IAuxStore");
    return name;
  }
 
  typedef IConstAuxStore const_type;
  static const std::string& const_typeName()
  { 
    static const std::string name ("SG::IConstAuxStore");
    return name;
  }
};
 

struct AuxStore_traits_NoAuxDefault
{
  typedef std::false_type flag;
 
  typedef NoAuxStore type;
  static const std::string& typeName()
  { 
    static const std::string name ("SG::NoAuxStore");
    return name;
  }
 
  typedef NoAuxStore const_type;
  static const std::string& const_typeName()
  { 
    static const std::string name ("SG::NoAuxStore");
    return name;
  }
};
 

template <class DOBJ, class FLAG_>
struct AuxStore_traits1
{
  typedef typename std::conditional<
    std::is_base_of<IAuxElement, DOBJ>::value,
                                AuxStore_traits_AuxDefault,
                                AuxStore_traits_NoAuxDefault>::type
    type;
};
 

template <class DOBJ>
struct AuxStore_traits1<DOBJ,
                        typename std::is_base_of<
                          IAuxElement, typename DOBJ::base_value_type>::type>
{
  typedef AuxStore_traits_AuxDefault type;
};
 

template <class DOBJ>
struct AuxStore_traits
  : public AuxStore_traits1<DOBJ, std::true_type>::type
{
};
 

template <class DOBJ>
struct AuxStore_traits<DOBJ*> : public AuxStore_traits<DOBJ> {};
 
 
 
} // namespace SG
 
 
#endif // not ATHCONTAINERSINTERFACES_AUXSTORE_TRAITS_H