Reason · Reason lets you write simple, fast and quality type safe code while leveraging both the JavaScript & OCaml ecosystems.

sig
 external code : char -> int = "%identity"
 val chr : int -> char
 val escaped : char -> string
 val lowercase_ascii : char -> char
 val uppercase_ascii : char -> char
 type t = char
 val compare : Char.t -> Char.t -> int
 val equal : Char.t -> Char.t -> bool
 external unsafe_chr : int -> char = "%identity"
end