Yep! You could check this in GHCi (the repl), for example: > :t (. id) > (. id) :: (b -> c) -> b -> c (:t prints the type of an expression, and id is the

Yep! You could check this in GHCi (the repl), for example: > :t (. id) > (. id) :: (b -> c) -> b -> c (:t prints the type of an expression, and id is the "identity function" that's b -> b here.) (EDIT: Maybe you know the above and you're asking if it's being changed in the proposal. It doesn't seem so to me.)