Nested Enums: The What, Why and When
They aren’t too hard!
We can add enums within enums, or even within a Struct or a Class in order to make our software design come alive.
This article will take us through just that.
The example
During 2020 the UK experienced various lockdowns. During some of these the number of acceptable activities for people resident in the UK was limited.
Therefore I’ve created a example right here:
The issue
There isn’t a massive issue here. If you want to use these enum in various places within your module the default (internal) access control would not be an issue.
But what if you want (and you should), to do better?
We could make any particular enum have a private level of access control. This isn’t exactly wrong, but we can do better.
Nested enum
We see that final property, the run one:= let run = PermittedExercise.run.
