Combinations.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TRIGCOMPOSITEUTILS_COMBINATIONS_H
#define TRIGCOMPOSITEUTILS_COMBINATIONS_H
 
#include "TrigCompositeUtils/IPartCombItr.h"
#include "TrigCompositeUtils/LinkInfo.h"
#include "xAODBase/IParticleContainer.h"
#include <functional>
#include <vector>
 
namespace TrigCompositeUtils
{
 
  class Combinations
  {
  public:
    using VecLInfo_t = IPartCombItr::VecLInfo_t;
 
    Combinations(
        const std::vector<std::size_t> &legMultiplicities,
        const std::vector<VecLInfo_t> &legFeatures,
        const IPartCombItr::FilterFunc_t &filter);
 
    Combinations(
        const std::vector<std::size_t> &legMultiplicities,
        const std::vector<VecLInfo_t> &legFeatures,
        FilterType filter = FilterType::UniqueObjects);
 
    Combinations(const IPartCombItr::FilterFunc_t &filter);
 
    Combinations(FilterType filter = FilterType::UniqueObjects);
 
    void reserve(std::size_t capacity);
 
    bool empty() const;
 
    std::size_t size() const;
 
    void addLeg(std::size_t multiplicity, const VecLInfo_t &features);
    void addLeg(std::size_t multiplicity, VecLInfo_t&& features);
    void addLeg(const VecLInfo_t &features);
    void addLeg(VecLInfo_t&& features);
 
    IPartCombItr begin() const;
    IPartCombItr end() const;
 
  private:
    IPartCombItr::FilterFunc_t m_filter;
    std::vector<std::size_t> m_legMultiplicities;
    std::vector<VecLInfo_t> m_legFeatures;
  }; //> end class Combinations
} // namespace TrigCompositeUtils
 
#endif //> TRIGCOMPOSITEUTILS_COMBINATIONS_H