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// Copyright 2021 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef INCLUDE_V8_MEMORY_SPAN_H_
#define INCLUDE_V8_MEMORY_SPAN_H_
#include <stddef.h>
#include "v8config.h" // NOLINT(build/include_directory)
namespace v8 {
/**
* Points to an unowned continous buffer holding a known number of elements.
*
* This is similar to std::span (under consideration for C++20), but does not
* require advanced C++ support. In the (far) future, this may be replaced with
* or aliased to std::span.
*
* To facilitate future migration, this class exposes a subset of the interface
* implemented by std::span.
*/
template <typename T>
class V8_EXPORT MemorySpan {
public:
/** The default constructor creates an empty span. */
constexpr MemorySpan() = default;
constexpr MemorySpan(T* data, size_t size) : data_(data), size_(size) {}
/** Returns a pointer to the beginning of the buffer. */
constexpr T* data() const { return data_; }
/** Returns the number of elements that the buffer holds. */
constexpr size_t size() const { return size_; }
private:
T* data_ = nullptr;
size_t size_ = 0;
};
} // namespace v8
#endif // INCLUDE_V8_MEMORY_SPAN_H_
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