Incomplete loop in Elm

Question

Does Elm have an expression that creates bottom / divergences like Haskell erroror Rust unimplemented!()?

eg.

map : (a -> b) -> List a -> List b
map = unimplemented

Answer 1

Yes, it Debug.crashhas a type String -> athat you can use as follows:

map : (a -> b) -> List a -> List b
map = Debug.crash "unimplemented"