Module Stdlib.Char

Character operations.

let code: char => int;

Return the ASCII code of the argument.

let chr: int => char;

Return the character with the given ASCII code.

  • raises Invalid_argument

    if the argument is outside the range 0--255.

let 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 (32..126) are escaped, as well as backslash, double-quote, and single-quote.

let lowercase_ascii: char => char;

Convert the given character to its equivalent lowercase character, using the US-ASCII character set.

  • since 4.03
let uppercase_ascii: char => char;

Convert the given character to its equivalent uppercase character, using the US-ASCII character set.

  • since 4.03
type t = char;

An alias for the type of characters.

let compare: t => t => int;

The comparison function for characters, with the same specification as Stdlib.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.

let equal: t => t => bool;

The equal function for chars.

  • since 4.03
let 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.

  • since 5.1
let 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.

  • since 5.1