BuildCombinations.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef DERIVATIONFRAMEWORKTRIGGER_BUILDCOMBINATIONS_H
#define DERIVATIONFRAMEWORKTRIGGER_BUILDCOMBINATIONS_H
 
#include "RangedItr.h"
 
namespace DerivationFramework { namespace TriggerMatchingUtils {

  template <typename T, typename PROJ = std::identity >
    bool insertIntoSortedVector(std::vector<T>& vec, const T& ele,
                                PROJ proj = {});

  template <typename R, typename PROJ = std::identity>
    std::vector<typename R::value_type> sorted(const R& r, PROJ proj = {});

  // First, a note on the type of the argument. This is essentially a way of
  // passing a vector of vectors but only with iterators over the vectors.
  template <typename T,
            typename INNERPROJ = std::identity,
            typename OUTERPROJ = std::identity>
    std::vector<std::vector<T>> getAllDistinctCombinations(
        std::vector<RangedItr<typename std::vector<T>::const_iterator>>& inputs,
        INNERPROJ innerproj = {},
        OUTERPROJ outerproj = {});
 
}} //> end namespace DerivationFramework::TriggerMatchingUtils
#include "BuildCombinations.icc"
#endif //> !DERIVATIONFRAMEWORKTRIGGER_BUILDCOMBINATIONS_H