I would say that the reason it is named `enum` is exactly not to surprise them. While learning Haskell, I had used `data` several times, but never grokked its t

I would say that the reason it is named `enum` is exactly not to surprise them. While learning Haskell, I had used `data` several times, but never grokked its true meaning. The naming of `enum` in Rust helped me finally understand what ADTs are, and thus also made me truly understand what Haskell's `data` is. I really appreciate Rust for trying to introduce a certain concept with the existing names.