I wouldn't say no, because it's built with the right spirit in mind. But at the same time, it's different from languages have native support for sum types. Adva

I wouldn't say no, because it's built with the right spirit in mind. But at the same time, it's different from languages have native support for sum types. Advantage of sum type is that it can be matched exhaustively like an enum, but at the same time it's flexible to contain any data like a data class.