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/*
* Copyright (c) 2021, Brian Gianforcaro <bgianf@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/SinglyLinkedList.h>
namespace AK {
template<typename T>
class SinglyLinkedListWithCount : private SinglyLinkedList<T> {
public:
SinglyLinkedListWithCount() = default;
~SinglyLinkedListWithCount() = default;
using List = SinglyLinkedList<T>;
using List::is_empty;
using List::size_slow;
inline size_t size() const
{
return m_count;
}
void clear()
{
List::clear();
m_count = 0;
}
T& first()
{
return List::first();
}
const T& first() const
{
return List::first();
}
T& last()
{
return List::last();
}
const T& last() const
{
return List::last();
}
T take_first()
{
m_count--;
return List::take_first();
}
template<typename U = T>
void append(U&& value)
{
m_count++;
return List::append(forward<T>(value));
}
bool contains_slow(const T& value) const
{
return List::contains_slow(value);
}
using Iterator = typename List::Iterator;
friend Iterator;
Iterator begin() { return List::begin(); }
Iterator end() { return List::end(); }
using ConstIterator = typename List::ConstIterator;
friend ConstIterator;
ConstIterator begin() const { return List::begin(); }
ConstIterator end() const { return List::end(); }
template<typename TUnaryPredicate>
ConstIterator find(TUnaryPredicate&& pred) const
{
return List::find_if(forward<TUnaryPredicate>(pred));
}
template<typename TUnaryPredicate>
Iterator find(TUnaryPredicate&& pred)
{
return List::find_if(forward<TUnaryPredicate>(pred));
}
ConstIterator find(const T& value) const
{
return List::find(value);
}
Iterator find(const T& value)
{
return List::find(value);
}
void remove(Iterator iterator)
{
m_count--;
return List::remove(iterator);
}
template<typename U = T>
void insert_before(Iterator iterator, U&& value)
{
m_count++;
List::insert_before(iterator, forward<T>(value));
}
template<typename U = T>
void insert_after(Iterator iterator, U&& value)
{
m_count++;
List::insert_after(iterator, forward<T>(value));
}
private:
size_t m_count { 0 };
};
}
using AK::SinglyLinkedListWithCount;
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