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/*
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Types.h>
namespace AK {
struct DefaultSizeCalculationPolicy {
constexpr void increase_size(auto const&) { }
constexpr void decrease_size(auto const&) { }
constexpr void reset() { }
constexpr size_t size(auto const* head) const
{
size_t size = 0;
for (auto* node = head; node; node = node->next)
++size;
return size;
}
};
struct CountingSizeCalculationPolicy {
constexpr void increase_size(auto const&) { ++m_size; }
constexpr void decrease_size(auto const&) { --m_size; }
constexpr void reset() { m_size = 0; }
constexpr size_t size(auto const*) const { return m_size; }
private:
size_t m_size { 0 };
};
}
#ifdef USING_AK_GLOBALLY
using AK::CountingSizeCalculationPolicy;
using AK::DefaultSizeCalculationPolicy;
#endif
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