Can we just have struct inheritence already?

[Walter Bright]

On 6/13/2019 5:35 PM, Timon Gehr wrote:
> It is obvious that allocation has to be pure. However, accessing the address of 
> your data is impure. The runtime systems of pure functional languages also 
> allocate memory, but the addresses are not exposed to the pure user code.

I know that technically you are correct, but I'm not so sure it matters for D's 
use of purity.