Question

If I have a type defined as a set of an enumerated type, it’s easy to create an empty set with [], but how do I create a full set?

EDIT: Yeah, the obvious solution is to use a for loop. That’s also a really bad solution if there’s another way. Does anyone know of a way that’ll work in constant time?

Answer 1

Low() and High() are ‘compiler magic’ functions that can be evaluated at compile time. This allows their use in constant declarations like the following:

 var   MySet : TBorderIcons;   MySet2 : TBorderIcons; const   AllIcons : TBorderIcons = [Low(TBorderIcon)..High(TBorderIcon)]; begin   MySet := [Low(TBorderIcon)..High(TBorderIcon)];   MySet2 := AllIcons; end;