#pragma once

#include <string>

#include "absl/types/optional.h"

namespace Envoy {

namespace Stats {

class StatName;

/**

 * General representation of a tag.

 */

struct Tag {

  std::string name_;

  std::string value_;

};

using TagVector = std::vector<Tag>;

using StatNameTag = std::pair<StatName, StatName>;

using StatNameTagVector = std::vector<StatNameTag>;

using StatNameTagVectorOptConstRef =

    absl::optional<std::reference_wrapper<const StatNameTagVector>>;

} // namespace Stats

} // namespace Envoy