RooSumL.h

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/*
 * Project: RooFit
 * Authors:
 *   PB, Patrick Bos, Netherlands eScience Center, p.bos@esciencecenter.nl
 *
 * Copyright (c) 2021, CERN
 *
 * Redistribution and use in source and binary forms,
 * with or without modification, are permitted according to the terms
 * listed in LICENSE (http://roofit.sourceforge.net/license.txt)
 */
 
#ifndef ROOT_ROOFIT_TESTSTATISTICS_RooSumL
#define ROOT_ROOFIT_TESTSTATISTICS_RooSumL
 
#include <RooFit/TestStatistics/RooAbsL.h>
 
#include "Math/Util.h" // KahanSum
 
#include <tuple>
 
namespace RooFit {
namespace TestStatistics {
 
class RooSumL : public RooAbsL {
public:
   RooSumL(RooAbsPdf *pdf, RooAbsData *data, std::vector<std::unique_ptr<RooAbsL>> components,
           RooAbsL::Extended extended = RooAbsL::Extended::Auto);
   // Note: when above ctor is called without std::moving components, you get a really obscure error. Pass as
   // std::move(components)!
 
   ROOT::Math::KahanSum<double>
   evaluatePartition(Section events, std::size_t components_begin, std::size_t components_end) override;
 
   // necessary only for legacy offsetting mode in LikelihoodWrapper; TODO: remove this if legacy mode is ever removed
   ROOT::Math::KahanSum<double> getSubsidiaryValue();
 
   void constOptimizeTestStatistic(RooAbsArg::ConstOpCode opcode, bool doAlsoTrackingOpt) override;
 
   std::string GetClassName() const override { return "RooSumL"; }
 
   const std::vector<std::unique_ptr<RooAbsL>> &GetComponents() const { return components_; };
 
private:
   std::vector<std::unique_ptr<RooAbsL>> components_;
};
 
} // namespace TestStatistics
} // namespace RooFit
 
#endif // ROOT_ROOFIT_TESTSTATISTICS_RooSumL