Spring4D How to correctly assign NULL to a Nullable type?
Posted by jpluimers on 2018/12/19
Since I tend to forget this: [WayBack] Spring4D How to correctly assign NULL to a Nullable type? this is correct? fDateTime = Null; or this? fDateTime := nil; – Jacek Laskowski – Google+
The preferred way is fDateTime := nil.
This is possible because of [WayBack] Delphi sorcery: How to create an operator overload that only accepts nil using a reference type (in this case interface) so no non-nil pointers can be passed:
type
Nullable<T> = record
strict private type
Null = interface end;
public
class operator Implicit(const value: Null): Nullable<T>;
end;
–jeroen
The Wiert Corner - irregular stream of stuff 
Jacek said
you often quote me here ;-)
jpluimers said
You write good stuff. Maybe I should quote you more (;