EgammaRange.h

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#ifndef EgammaIsolationAlgos_EgammaRange_H
#define EgammaIsolationAlgos_EgammaRange_H

#include <iostream>
#include <utility>
#include <algorithm>

namespace egammaisolation {

  template <class T>
  class EgammaRange : public std::pair<T, T> {
  public:
    EgammaRange() {}

    EgammaRange(const T& aMin, const T& aMax) : std::pair<T, T>(aMin, aMax) {}

    EgammaRange(const std::pair<T, T>& aPair) : std::pair<T, T>(aPair) {}

    const T& min() const { return this->first; }

    const T& max() const { return this->second; }

    T mean() const { return (this->first + this->second) / 2.; }

    bool empty() const { return (this->second < this->first); }

    bool inside(const T& value) const {
      if (value < this->first || this->second < value)
        return false;
      else
        return true;
    }

    void sort() {
      if (empty())
        std::swap(this->first, this->second);
    }
  };

}  // namespace egammaisolation

template <class T>
std::ostream& operator<<(std::ostream& out, const egammaisolation::EgammaRange<T>& r) {
  return out << "(" << r.min() << "," << r.max() << ")";
}

#endif