Q_DECL_CONST_FUNCTION constexpr inline size_t qHash(qint64 key, size_t seed = 0) noexcept
{
    if constexpr (sizeof(qint64) > sizeof(size_t)) {
        // Avoid QTBUG-116080: we XOR the top half with its own sign bit:
        // - if the qint64 is in range of qint32, then signmask ^ high == 0
        //   (for Qt 7 only)
        // - if the qint64 is in range of quint32, then signmask == 0 and we
        //   do the same as the quint64 overload above
        quint32 high = quint32(quint64(key) >> 32);
        quint32 low = quint32(quint64(key));
        quint32 signmask = qint32(high) >> 31;  // all zeroes or all ones
        signmask = QT_VERSION_MAJOR > 6 ? signmask : 0;
        low ^= signmask ^ high;
        return qHash(low, seed);
    } else {
        return qHash(quint64(key), seed);
    }
}