Visitor.h

#pragma once

namespace ChimeraTK {

  /* Losely based on
   * https://stackoverflow.com/questions/11796121/implementing-the-visitor-pattern-using-c-templates#11802080
   */

  template<typename... Types>
  class Visitor;

  template<typename T>
  class Visitor<T> {
   public:
    virtual void dispatch(const T& t) = 0;
  };

  template<typename T, typename... Types>
  class Visitor<T, Types...> : public Visitor<T>, public Visitor<Types...> {
   public:
    using Visitor<Types...>::dispatch;
    using Visitor<T>::dispatch;
  };

} // namespace ChimeraTK