`include module type of struct include Stdlib.Char end`
`type t = char`
`val code : char -> int`
`val chr : int -> char`
`val escaped : char -> string`
`val compare : t -> t -> int`
`module Ascii : sig ... end`
`val lowercase_ascii : char -> char`
`val uppercase_ascii : char -> char`
`val seeded_hash : int -> t -> int`
`val hash : t -> int`
`val unsafe_chr : int -> char`
`val equal : char -> char -> bool`