I'm attempting to give the RFC41 fixed point types a spin and I'm trying to create a struct that wraps two fixed point numbers to create a complex number, is there a better way of implementing `__mul__` on a struct view than this:

```python
class CFixLayout(data.StructLayout):
    def __init__(self, shape):
        super().__init__({
            "real": shape,
            "imag": shape,
        })

    def __call__(self, value):
        return CFixView(self, value)

class CFixView(data.View):
    def __mul__(self, other):
        r, i = self.real * other.real - self.imag * other.imag, self.imag * other.real + self.real * other.imag
        width = r.f_width + r.i_width + (1 if r.signed else 0)
        return CFixView(CFixLayout(r.shape()), (r.as_value() | (i.as_value() << (width)))[:2*width])
```