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** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
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** GNU General Public License Usage
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** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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#pragma once

#include <cplusplus/SafeMatcher.h>

#include <QSet>

namespace CPlusPlus {

template<typename T>
class AlreadyConsideredClassContainer
{
public:
    AlreadyConsideredClassContainer() : _class(nullptr) {}
    void insert(const T *item)
    {
        if (_container.isEmpty())
            _class = item;
        _container.insert(item);
    }
    bool contains(const T *item)
    {
        if (_container.contains(item))
            return true;

        SafeMatcher matcher;
        foreach (const T *existingItem, _container) {
            if (Matcher::match(existingItem, item, &matcher))
                return true;
        }

        return false;
    }

    void clear(const T *item)
    {
        if (_class != item || _container.size() == 1)
            _container.clear();
    }

private:
    QSet<const T *> _container;
    const T * _class;
};

} // namespace CPlusPlus
