[SoM] trivial enums aren't showing constructors, methods and properties

[stephen-hawley]

public enum {
    case good, bad
    public init(isGood: Bool) {
        if isGood {
            self = .good
         }
        else {
            self = .bad
        }
    }
    public func convertToString() -> String {
        if self == .good {
            return "Good"
        }
        else {
            return "Bad"
       }
    }
}

This is tricky in that the distinction between trivial and non-trivial enums has to do with whether or not the have a case with a non-integral payload.
A non-trivial enum is represented by a class that implements ISwiftEnum.
A trivial enum is represented by an enum. We also create a set of extension methods on it.
There are two options here.
The easiest path is to redefine a non-trivial enum as having either a non-trivial enum or having methods. This is not palatable because it adds overhead to all marshaling for that type which should have 0 overhead.
The other path is to put every method into the extension methods. This is possible, but the problem is that every method has to be transformed into a static extension method, which puts them through a completely different code path than either structs or classes or non-trivial enums, which all share the same code paths.