PrintHelpers.h

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// Dear emacs, this is -*- c++ -*-
 
/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
// $Id: PrintHelpers.h 646509 2015-02-12 16:43:18Z krasznaa $
#ifndef XAODCORE_TOOLS_PRINTHELPERS_H
#define XAODCORE_TOOLS_PRINTHELPERS_H
 
// System include(s):
#include <concepts>
#include <iosfwd>
#include <format>
 
// Forward declaration(s):
namespace SG {
   class AuxElement;
}

std::ostream& operator<< ( std::ostream& out, const SG::AuxElement& obj );
 
namespace xAOD {

   void dump( const SG::AuxElement& obj );
 
   std::string toString ( const SG::AuxElement& obj );
 
} // namespace xAOD
 
 
namespace std {
 
 
// C++23 compatible formatter.
template <std::derived_from<SG::AuxElement> T>
struct formatter<T>
  : public formatter<string_view>
{
  template <class FmtContext>
  FmtContext::iterator format(const T& k, FmtContext& ctx) const
  {
    return formatter<string_view>::format( xAOD::toString( k ), ctx );
  }
};
 
 
} // namespace std
 
 
#endif // XAODCORE_TOOLS_PRINTHELPERS_H