// Copyright 2022 The TensorStore Authors
//
// 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 TENSORSTORE_INTERNAL_ESTIMATE_HEAP_USAGE_STD_OPTIONAL_H_
#define TENSORSTORE_INTERNAL_ESTIMATE_HEAP_USAGE_STD_OPTIONAL_H_

#include <optional>

#include "tensorstore/internal/estimate_heap_usage/estimate_heap_usage.h"

namespace tensorstore {
namespace internal {

template <typename T>
struct HeapUsageEstimator<std::optional<T>> {
  static size_t EstimateHeapUsage(const std::optional<T>& v, size_t max_depth) {
    if (!v) return 0;
    return internal::EstimateHeapUsage(*v, max_depth);
  }
  static constexpr bool MayUseHeapMemory() {
    return internal::MayUseHeapMemory<T>;
  }
};

}  // namespace internal
}  // namespace tensorstore

#endif  // TENSORSTORE_INTERNAL_ESTIMATE_HEAP_USAGE_STD_OPTIONAL_H_
