Is there more direct evidence indicating that the values of enumeration members are referenced by the constructor of the enumeration class?

In the book I've read, it was mentioned that the values of enumeration members are passed as parameters to the constructor of the enumeration class. I was hoping to find more information about this in the MATLAB documentation, but I could only find some indirect evidence, , like this page. （Define Properties in Enumeration Classes）

classdef SyntaxColors
   properties
      R
      G
      B
   end
   methods
      function c = SyntaxColors(r, g, b)
         c.R = r; c.G = g; c.B = b;
      end
   end
   enumeration
      Error   (1, 0, 0)
      Comment (0, 1, 0)
      Keyword (0, 0, 1)
      String  (1, 0, 1)
   end
end

run：

e = SyntaxColors.Error;
e.R
ans =

     1

However, I couldn't find more in-depth explanations.

For example, can the values of enumeration members be characters or strings?

classdef Bearing
   enumeration
      North ("N")
      East  ("E")
      South ("S")
      West  ("W")
   end
end

Can they be cell?

classdef Bearing
   enumeration
      North {0}
      East  {90}
      South {180}
      West  {270}
   end
end

Can they be objects of other classes?

I couldn't find any relevant information in my search of the official documentation. Is there official MATLAB documentation on this topic?