include module type of sig ... endThe comparison function for characters, with the same specification as
Pervasives.compare. Along with the type t, this function compare
allows the module Char to be passed as argument to the functors
Set.Make and Map.Make.
Convert the given character to its equivalent lowercase character, using the US-ASCII character set.
Convert the given character to its equivalent uppercase character, using the US-ASCII character set.
val of_int_exn : int ‑> tAlias to Char.chr. Return the character with the given ASCII code.
0,...,255.