> Haskell doesn't have exhaustive pattern matching it just gives you a warning. It can have exhaustive pattern matching if you use `-Werror`. That's frequentl

> Haskell doesn't have exhaustive pattern matching it just gives you a warning. It can have exhaustive pattern matching if you use `-Werror`. That's frequently the default in an industrial Haskell setting. I wish that non-exhaustive patterns would be an error by default though.