3 ms·

There are no enums in Erlang and Elixir. If you have a case expression and there is no match with the given value, you'll get a run time error. This is delibera

• IsTom 12y ago
  Haskell doesn't require you to do that by default. There is a warning flag for that, but in general language is okay with defining partial functions, more so than most languages (because laziness lets you cheat death).
• kibwen 12y ago
  > Statically typed languages like Haskell and Rust require > the programmer to list all possible cases when matching > on a value. This isn't a consequence of static vs. dynamic, it's just a question of philosophy. In fact, Rust didn't use to require you exhaustively list out all cases, though it does today in order to help catch errors at compile-time rather than at runtime. I should also mention that if yo don't want to list out all variants, that's easily done by using the _ pattern (the "ignore this" pattern): match some_direction { East => print("You're going east!"), _ => print("You're going in some direction that isn't east!") }
  • alco 12y ago
    What I mean is that it's not possible in a dynamically typed language to enforce at compile time enumeration of all possible cases for a variable, the type of which will be known at run time.