IQubitId.h

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#pragma once
#include <cstddef>
#include <functional>
 
namespace quisp::backends::abstract {
 
class IQubitId {
 public:
  virtual ~IQubitId(){};
 
  class Hash {
   public:
    std::size_t operator()(const IQubitId& id) const { return id.hash(); }
    std::size_t operator()(const IQubitId* id) const { return id->hash(); }
  };
  class Pred {
   public:
    bool operator()(const IQubitId& id1, const IQubitId& id2) const { return id1.compare(id2); }
    bool operator()(const IQubitId* id1, const IQubitId* id2) const { return id1->compare(*id2); }
  };
 
 protected:
  virtual std::size_t hash() const = 0;
 
  virtual bool compare(const IQubitId& id) const = 0;
};
}  // namespace quisp::backends::abstract