It is much more like haskell's pattern matching. Notably it handles tagged unions (in rust enum). Here is a good example from the [book](https://doc.rust-lang.o

It is much more like haskell's pattern matching. Notably it handles tagged unions (in rust enum). Here is a good example from the [book](https://doc.rust-lang.org/book/match.html https://doc.rust-lang.org/book/match.html): enum Message { Quit, ChangeColor(i32, i32, i32), Move { x: i32, y: i32 }, Write(String), } fn quit() { /* ... */ } fn change_color(r: i32, g: i32, b: i32) { /* ... */ } fn move_cursor(x: i32, y: i32) { /* ... */ } fn process_message(msg: Message) { match msg { Message::Quit => quit(), Message::ChangeColor(r, g, b) => change_color(r, g, b), Message::Move { x: x, y: y } => move_cursor(x, y), Message::Write(s) => println!("{}", s), }; }