VariantHelpers.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
#ifndef O2_FRAMEWORK_VARIANTHELPERS_H_
#define O2_FRAMEWORK_VARIANTHELPERS_H_
 
#include "Framework/CompilerBuiltins.h"
 
namespace o2::framework
{
template <class... Ts>
struct O2_VISIBILITY_HIDDEN overloaded : Ts... {
  using Ts::operator()...;
};
 
template <class... Ts>
overloaded(Ts...)->overloaded<Ts...>;
} // namespace o2::framework
 
#endif // O2_FRAMEWORK_VARIANTHELPERS_H_