How does D distnguish managed pointers from raw pointers?

[Dennis]

On Friday, 4 October 2019 at 19:08:04 UTC, Adam D. Ruppe wrote:
> (personally though I like to explicitly slice it all the time 
> though, it is more clear and the habit is nice)

Turns out I have this habit as well. I'm looking through some of 
my code and see redundant slicing everywhere.