ladybird/AK/ValueComparingRefPtr.h

/*
 * Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

#include <AK/RefPtr.h>

namespace AK {

template<typename T>
struct ValueComparingNonnullRefPtr : public NonnullRefPtr<T> {
    using NonnullRefPtr<T>::NonnullRefPtr;

    ValueComparingNonnullRefPtr(NonnullRefPtr<T> const& other)
        : NonnullRefPtr<T>(other)
    {
    }

    ValueComparingNonnullRefPtr(NonnullRefPtr<T>&& other)
        : NonnullRefPtr<T>(move(other))
    {
    }

    bool operator==(ValueComparingNonnullRefPtr const& other) const
    {
        return this->ptr() == other.ptr() || this->ptr()->equals(*other);
    }

private:
    using NonnullRefPtr<T>::operator==;
};

template<typename T>
struct ValueComparingRefPtr : public RefPtr<T> {
    using RefPtr<T>::RefPtr;

    ValueComparingRefPtr(RefPtr<T> const& other)
        : RefPtr<T>(other)
    {
    }

    ValueComparingRefPtr(RefPtr<T>&& other)
        : RefPtr<T>(move(other))
    {
    }

    template<typename U>
    bool operator==(ValueComparingNonnullRefPtr<U> const& other) const
    {
        return this->ptr() == other.ptr() || (this->ptr() && this->ptr()->equals(*other));
    }

    bool operator==(ValueComparingRefPtr const& other) const
    {
        return this->ptr() == other.ptr() || (this->ptr() && other.ptr() && this->ptr()->equals(*other));
    }

    bool operator==(nullptr_t) const
    {
        return this->is_null();
    }

private:
    using RefPtr<T>::operator==;
};

}