[toastal]

Dropping the semicolons, all the brackets, and other JS-y syntax of ReasonML in favor of something more OCaml-y makes this a lot easier to read. I'm super confused at a capital U being the sigil for uncurried functions; it just is not a convention I'd expect from a modern language.

[yawaramin]

It's not a sigil, it's just a naming convention. For example, in the OCaml world there's a convention for functions that throw exceptions to have a '_exn' suffix. In Haskell there's a convention for monadic function to have an 'M' suffix.