ShowerParticleIterator.h

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#ifndef _utl_ShowerParticleIterator_h_
#define _utl_ShowerParticleIterator_h_

#include <iterator>
#include <cstddef>

#include <utl/CoordinateSystemPtr.h>


namespace utl {

  class Particle;
  class VShowerFileParticleIterator;

  class ShowerParticleIterator :
    public std::iterator<std::input_iterator_tag, Particle, ptrdiff_t> {

  public:
    explicit ShowerParticleIterator(VShowerFileParticleIterator* const fileIt = nullptr,
                                    const CoordinateSystemPtr& cs = CoordinateSystemPtr());

    const Particle& operator*() const;
    const Particle* operator->() const;

    ShowerParticleIterator& operator++();
    ShowerParticleIterator operator++(int);

    bool operator==(const ShowerParticleIterator& it) const;
    bool operator!=(const ShowerParticleIterator& it) const
    { return !operator==(it); }

  private:
    void CheckReference() const;

    VShowerFileParticleIterator* fParticles = nullptr;
    CoordinateSystemPtr fGroundCS;
    Particle* fCurrentParticle = nullptr;
  };

}


#endif