feature.h

#ifndef _TelepathyQt_feature_h_HEADER_GUARD_
#define _TelepathyQt_feature_h_HEADER_GUARD_

#ifndef IN_TP_QT_HEADER
#error IN_TP_QT_HEADER
#endif

#include <TelepathyQt/Global>

#include <QMetaType>
#include <QPair>
#include <QSet>
#include <QSharedDataPointer>
#include <QString>

namespace Tp
{

class TP_QT_EXPORT Feature : public QPair<QString, uint>
{
public:
    Feature();
    Feature(const QString &className, uint id, bool critical = false);
    Feature(const Feature &other);
    ~Feature();

    bool isValid() const { return mPriv.constData() != 0; }

    Feature &operator=(const Feature &other);

    bool isCritical() const;

private:
    struct Private;
    friend struct Private;
    QSharedDataPointer<Private> mPriv;
};

class TP_QT_EXPORT Features : public QSet<Feature>
{
public:
    Features() { }
    Features(const Feature &feature) { insert(feature); }
    Features(const QSet<Feature> &s) : QSet<Feature>(s) { }
};

inline Features operator|(const Feature &feature1, const Feature &feature2)
{
    return Features() << feature1 << feature2;
}

inline Features operator|(const Features &features, const Feature &feature)
{
    return Features(features) << feature;
}

inline uint qHash(const Features &features)
{
    int ret = 0;
    Q_FOREACH (const Feature &feature, features) {
        int h = qHash(feature);
        ret ^= h;
    }
    return ret;
}

} // Tp

Q_DECLARE_METATYPE(Tp::Feature);
Q_DECLARE_METATYPE(Tp::Features);

#endif