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Module Char


module Char: Extlib.ExtChar.Char
Operations on characters.

Characters range upon Latin-1 encoding, i.e. languages used in Western Europe and North America. For international characters, another, richer, module is provided: UChar.
Author(s): Xavier Leroy (base module), David Teller

type t = char
An alias for the type of characters.
val is_whitespace : char -> bool
Determine if a character is a whitespace. Whitespace characters are defined as ' ', '\010', '\013', '\009', '\026' and '\012'.
val is_uppercase : char -> bool
Determine if a character is uppercase ASCII. A character is uppercase ASCII if it is between 'A' and 'Z'
val is_lowercase : char -> bool
Determine if a character is lowercase ASCII. A character is lowercase ASCII if it is between 'a' and 'z'
val is_uppercase_latin1 : char -> bool
Determine if a character is uppercase Latin 1. A character is uppercase ASCII if it is between 'A' and 'Z', between 'À' and 'Ö' or between 'Ø' and 'Ý'
val is_lowercase_latin1 : char -> bool
Determine if a character is lowercase Latin 1. A character is lowercase ASCII if it is between 'a' and 'z', between 'Þ' and 'ö' or between 'ø' and 'ÿ'
val is_latin1 : char -> bool
Determine if a character is a Latin 1 letter. A character is a Latin 1 letter if it is either an uppercase or a lowercase Latin 1 character.
val is_digit : char -> bool
Determine if a character represents a digit. Digits are '0', '1', ... '9'.
val is_symbol : char -> bool
Determine if a character represents a (OCaml-style) symbol. Symbols are '!', '%', '&', '$', '#', '+', '-', '/', ':', '<', '=' '>', '?', '@', '\\', '~', '^', '|', '*'
val is_letter : char -> bool
Determine if a character represents a ASCII letter.
val is_newline : char -> bool
Determine if a character is a newline. Newline characters are defined as '\010' and '\013'
val of_digit : int -> char
Return the character representing a given digit. Raise Invalid_argument "Char.of_digit" if the argument is outside the range 0--9
val chr : int -> char
Return the character with the given ASCII code. Raise Invalid_argument "Char.chr" if the argument is outside the range 0--255.
val escaped : char -> string
Return a string representing the given character, with special characters escaped following the lexical conventions of Objective Caml.
val lowercase : char -> char
Convert the given character to its equivalent lowercase character.
val uppercase : char -> char
Convert the given character to its equivalent uppercase character.
val compare : t -> t -> int
The comparison function for characters, with the same specification as Standard.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.
val enum : unit -> char Enum.t
Produce the enumeration of all characters
val range : ?until:char -> char -> char Enum.t
val (--) : char -> char -> char Enum.t
Produce the enumeration of a segment of characters.

'a' -- 'z' is the enumeration of all characters between 'a' and 'z' included.

val code : char -> int
Return the ASCII code of the argument.

Boilerplate code


S-Expressions

val t_of_sexp : Sexplib.Sexp.t -> t
val sexp_of_t : t -> Sexplib.Sexp.t

Printing

val print : 'a Extlib.InnerIO.output -> t -> unit