EventReader.hh

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#pragma once
 
#include <cstddef>
#include <memory>
#include <optional>
#include <string>
 
namespace LHEF {
  class HEPEUP;
  class HEPRUP;
}
 
namespace HEJ {
 
  struct EventReader {
    virtual bool read_event() = 0;
 
    virtual std::string const & header() const = 0;
 
    virtual LHEF::HEPRUP const & heprup() const = 0;
 
    virtual LHEF::HEPEUP const & hepeup() const = 0;
 
    virtual std::optional<std::size_t> number_events() const = 0;
 
    virtual double scalefactor() const {
      return 1.;
    };
 
    virtual ~EventReader() = default;
  };
 
 
  std::unique_ptr<EventReader> make_reader(std::string const & filename);
} // namespace HEJ