module Char: sig .. end
Character operations.
Characters are the elements of string and bytes values. Characters represent bytes, that is an integer in the range [0x00;0xFF].
Some of the functions of this module interpret the characters in the range [0x00;0x7F] as the characters of the ASCII character set.
type t = char
An alias for the type of characters.
val code : char -> int
Return the integer code of the argument.
val chr : int -> char
Return the character with the given integer code.
Invalid_argument if the argument is outside the range [0x00;0xFF].val escaped : char -> string
Return a string representing the given character, with special characters escaped following the lexical conventions of OCaml. All characters outside the ASCII printable range [0x20;0x7E] are escaped, as well as backslash, double-quote, and single-quote.
See also the Char.Ascii module.
val compare : t -> t -> int
val equal : t -> t -> bool
The equal function for chars.
module Ascii: sig .. end
ASCII character set support.
val lowercase_ascii : char -> char
Use the equivalent Char.Ascii.lowercase instead.
val uppercase_ascii : char -> char
Use the equivalent Char.Ascii.uppercase instead.
val seeded_hash : int -> t -> int
A seeded hash function for characters, with the same output value as Hashtbl.seeded_hash. This function allows this module to be passed as argument to the functor Hashtbl.MakeSeeded.
val hash : t -> int
An unseeded hash function for characters, with the same output value as Hashtbl.hash. This function allows this module to be passed as argument to the functor Hashtbl.Make.
© 1995-2025 INRIA.
https://ocaml.org/manual/5.4/api/Char.html