struct Structs_S
{
    int x;
    int y;

    QDataStream opBinaryRight(string op : ">>")(QDataStream ds)
    {
        ds >> x;
        ds >> y;
        return ds;
    }

    QDataStream opBinaryRight(string op : "<<")(QDataStream ds)
    {
        ds << y;
        ds << x;
        return ds;
    }
}

static this()
{
    qRegisterMetaType!Structs_S;
    qRegisterMetaTypeStreamOperators!Structs_S;
}

{
    auto v = QVariant.fromValue(Structs_S(42, 43));
    auto ba = QByteArray();
    auto ds = scoped!QDataStream(&ba, QIODevice.ReadWrite);

    ds << v;
    v.clear();

    auto ds2 = scoped!QDataStream(&ba, QIODevice.ReadOnly);
    ds2 >> v;

    auto s = v.value!Structs_S();
    assert (s.x == 42 && s.y == 43);
}