Improvement in pure functions specification

[deadalnix via Digitalmars-d]

On Friday, 23 December 2016 at 20:01:49 UTC, Andrei Alexandrescu 
wrote:
> $(P Destructors will always be called even if they appear to be 
> strongly pure.)
>
> Any other special functions we should worry about?
>
>
> Andrei

Why ?