unittest {
    {
        public Vector!(T) opBinary(string op, string file = __FILE__, size_t line = __LINE__)(
                const Vector!(T) x) const if (op == "*")
        in {
        }
        body {
        }

    }
}

public Vector!(T) opBinary(string op, string file = __FILE__, size_t line = __LINE__)(
        const Vector!(T) x) const if (op == "*")
in {
}
body {
}