You can wrap the sizeof in static(sizeof(MyRefObject()[])) but I'm pretty sure
the VM will complain that there is no address at compile-time.
Alternatively from the following definition
type
MyObject = object
a : int
b : int
c : int
MyRefObject = ref MyObject
Run
You can make sure that MyRefObject is always up-to-date with MyObject
implementation for your sizeof.
If you want one step further, you can implement a typed macro with `getType`
and `getImpl` that resolve the ref MyObject from the MyRefObject type, and then
statically calls sizeof on that. This is left as an exercise to the reader ;).