Optional type - how to correctly reset a wrapped immutable T

[jmh530]

On Tuesday, 27 March 2018 at 06:26:57 UTC, aliak wrote:
> [snip]
>
> By the by,  how come inout has to be stack based and 
> const/immutable/mutable doesn't? Isn't inout just one of those 
> depending on context?

Example?