optional.h

// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_OPTIONAL_H
#define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_OPTIONAL_H

#include "google/cloud/version.h"
#include "absl/types/optional.h"

namespace google {
namespace cloud {
inline namespace GOOGLE_CLOUD_CPP_NS {

/**
 * Alias template for google::cloud::optional.
 *
 * @deprecated this alias is deprecated; use `absl::optional<T>` directly.
 */
template <typename T>
using optional = absl::optional<T>;

}  // namespace GOOGLE_CLOUD_CPP_NS
}  // namespace cloud
}  // namespace google

#endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_OPTIONAL_H