val code : 'a char -> 'a int
Return the ASCII code of the argument.
val chr : 'a int -{'b | Invalid_argument: 'b |}-> 'a char
with 'a < 'b
Return the character with the given ASCII code.
Raise Invalid_argument "Char.chr" if the argument is
outside the range 0--255.
val escaped : 'a char -> 'a string
Return a string representing the given character,
with special characters escaped following the lexical conventions
of Objective Caml.
val lowercase : 'a char -> 'a char
Convert the given character to its equivalent lowercase character.
val uppercase : 'a char -> 'a char
Convert the given character to its equivalent uppercase character.
