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#ifndef GRPCXX_AUTH_PROPERTY_ITERATOR_H
#define GRPCXX_AUTH_PROPERTY_ITERATOR_H

#include <iterator>
#include <vector>

#include <grpc++/config.h>

struct grpc_auth_context;
struct grpc_auth_property;
struct grpc_auth_property_iterator;

namespace grpc {
class SecureAuthContext;

typedef std::pair<grpc::string, grpc::string> AuthProperty;

class AuthPropertyIterator
    : public std::iterator<std::input_iterator_tag, const AuthProperty> {
 public:
  ~AuthPropertyIterator();
  AuthPropertyIterator& operator++();
  AuthPropertyIterator operator++(int);
  bool operator==(const AuthPropertyIterator& rhs) const;
  bool operator!=(const AuthPropertyIterator& rhs) const;
  const AuthProperty operator*();

 protected:
  AuthPropertyIterator();
  AuthPropertyIterator(const grpc_auth_property* property,
                       const grpc_auth_property_iterator* iter);
 private:
  friend class SecureAuthContext;
  const grpc_auth_property* property_;
  // The following items form a grpc_auth_property_iterator.
  const grpc_auth_context* ctx_;
  size_t index_;
  const char* name_;
};

}  // namespace grpc

 #endif  // GRPCXX_AUTH_PROPERTY_ITERATOR_H