PartonFluxFactory.h

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/*
 *  CepGen: a central exclusive processes event generator
 *  Copyright (C) 2023-2024  Laurent Forthomme
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef CepGen_Modules_PartonFluxFactory_h
#define CepGen_Modules_PartonFluxFactory_h
 
#include "CepGen/Modules/ModuleFactory.h"
 
#define REGISTER_COLLINEAR_FLUX(name, obj)                                        \
  namespace cepgen {                                                              \
    struct BUILDERNM(obj) {                                                       \
      BUILDERNM(obj)() { CollinearFluxFactory::get().registerModule<obj>(name); } \
    };                                                                            \
    static const BUILDERNM(obj) gCollinearFlux##obj;                              \
  }                                                                               \
  static_assert(true, "")
#define REGISTER_KT_FLUX(name, id, obj)                                                       \
  namespace cepgen {                                                                          \
    struct BUILDERNM(obj) {                                                                   \
      BUILDERNM(obj)() { KTFluxFactory::get().addIndex(id, name).registerModule<obj>(name); } \
    };                                                                                        \
    static const BUILDERNM(obj) gKTFlux##obj;                                                 \
  }                                                                                           \
  static_assert(true, "")
 
namespace cepgen {
  class CollinearFlux;
  class KTFlux;
  DEFINE_FACTORY(CollinearFluxFactory, CollinearFlux, "Collinear parton flux estimators factory");
  DEFINE_FACTORY(KTFluxFactory, KTFlux, "KT-factorised flux estimators factory");
 
  struct PartonFluxFactory {
    static PartonFluxFactory& get() {
      static PartonFluxFactory instance;
      return instance;
    }
 
    ParametersDescription describeParameters(const std::string& name,
                                             const ParametersList& params = ParametersList()) const;
    bool elastic(const ParametersList&) const;     
    int partonPdgId(const ParametersList&) const;  
  };
}  // namespace cepgen
 
#endif