// Copyright 2019-2024 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 ALICEO2_MERGERS_H

#define ALICEO2_MERGERS_H

/// \file Mergeable.h

/// \brief Mergeable concept.

///

/// \author Michal Tichak, michal.tichak@cern.ch

#include <concepts>

class TObject;

class TH1;

class TCollection;

class TObjArray;

class TH1;

class TTree;

class THnBase;

class TEfficiency;

class TGraph;

class TCanvas;

namespace o2::mergers

{

class MergeInterface;

template <typename T, typename... Ts>

constexpr bool IsDerivedFrom = (std::derived_from<T, Ts> || ...);

// \brief Concept to be used to test if some parameter is mergeable

//

// \parameter T type to be restricted

template <typename T>

concept Mergeable = IsDerivedFrom<std::remove_pointer_t<T>, mergers::MergeInterface, TCollection, TH1, TTree, TGraph, TEfficiency, THnBase, TCanvas>;

// \brief runtime check whether TObject is mergeable

bool isMergeable(TObject* obj);

} // namespace o2::mergers

#endif