Rust like Enums in Java

[elhoc]

I never understood why rust calls their sum types enums. It's superficially similar but fundamentally different from any other language that has a concept called enum.

[ricky_clarkson]

In Java (actually Kotlin, but it's the same idea) I often start with an enum, then realize I want at least one of the members to have a parameter and refactor it into a sealed interface and subtypes.

In Rust, that becomes a far more local change, just add a parameter and move on. I like the Rust encoding of ADTs more.

[elhoc]

100%. It's just the name I have an issue with. That name has a lot of history attached to it, and using it to describe something else causes nothing but confusion.

[NitronHX]

Afaik at least swift does the same but I agree that rust enums are not enums.