How to get all characters of the font with CTFontCopyCharacterSet() in Swift?

Question

How does one get all characters of the font with CTFontCopyCharacterSet() in Swift? ... for macOS?

The issue occured when implementing the approach from an

Answer 1

You can do something like this.

let cs = CTFontCopyCharacterSet(font) as NSCharacterSet
let bitmapRepresentation = cs.bitmapRepresentation

The format of the bitmap is defined in the reference page for CFCharacterSetCreateWithBitmapRepresentation