maybe_deref_span.h | Explore in Territory

/*
 * Copyright 2023 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 DISTRIBUTED_POINT_FUNCTIONS_DPF_INTERNAL_ANY_SPAN_H_
#define DISTRIBUTED_POINT_FUNCTIONS_DPF_INTERNAL_ANY_SPAN_H_

// A class that can serve the purpose of both absl::Span<T> and absl::Span<T*>
// at the same time. Introduces the run-time overhead of a std::variant check.
//
// Note that this class DOES NOT provide common container features, such as
// iterators. It is not intended to be used by users of this library. Any
// function that takes a MaybeDerefSpan<T> should be called with either an
// absl::Span<T> or an absl::Span<T*>.

#include <type_traits>

#include "absl/meta/type_traits.h"
#include "absl/types/span.h"
#include "absl/types/variant.h"

namespace distributed_point_functions {
namespace dpf_internal {

template <typename T>
class MaybeDerefSpan { … };

}  // namespace dpf_internal
}  // namespace distributed_point_functions

#endif  // DISTRIBUTED_POINT_FUNCTIONS_DPF_INTERNAL_ANY_SPAN_H_
chromium/third_party/distributed_point_functions/code/dpf/internal/maybe_deref_span.h
