FlexibleArray.h

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/*
 * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */
 
#ifndef SQUID_SRC_IPC_MEM_FLEXIBLEARRAY_H
#define SQUID_SRC_IPC_MEM_FLEXIBLEARRAY_H
 
#include <cstddef>
#include <new>
 
namespace Ipc
{
 
namespace Mem
{
 
template <class Item>
class FlexibleArray
{
public:
    explicit FlexibleArray(const int capacity) {
        new (raw()) Item[capacity];
    }
 
    Item &operator [](const int idx) { return *(raw() + idx); }
 
    Item *raw() { return reinterpret_cast<Item*>(&start_); }
 
private:
    alignas(Item) std::byte start_; 
};
 
} // namespace Mem
 
} // namespace Ipc
 
#endif /* SQUID_SRC_IPC_MEM_FLEXIBLEARRAY_H */