It's pattern matching, it's a feature of most functional languages (yes, Haxe is OO, but the language feels veeerrrrry familiar to someone who has used OCaml).

It's pattern matching, it's a feature of most functional languages (yes, Haxe is OO, but the language feels veeerrrrry familiar to someone who has used OCaml). Starting to become a more common feature as languages absorb and expose functional-style features (C#, Swift, Kotlin, Rust etc)