Module CharExtras

module CharExtras: sig  end

Utility functions for dealing with characters

Locale

val set_chartype : string -> string option

Set the CTYPE locale.

val get_chartype : unit -> string

Query the CTYPE locale being used.

Character classification

The following functions test characters for certain properties. Wrappers for the C <ctype.h> header.

val is_alpha : char -> bool

Is the character alphabetic?

val is_space : char -> bool

Is the character whitespace?

val is_number : char -> bool

Is the character a digit?

val is_lower : char -> bool

Is the character lowercase?

val is_upper : char -> bool

Is the character uppercase?

val is_alphanumeric : char -> bool

Is the character alphabetic or a digit?

val is_punctation : char -> bool

Is the character a punctuation symbol?

val is_printable : char -> bool

Is the character displayable?

val is_graphical : char -> bool

Is the character displayable and not whitespace?

val is_hexadecimal : char -> bool

Is the character a digit in base 16?

Character transformation

val to_lower : char -> char

Lowercase the character according to the CTYPE locale.

val to_upper : char -> char

Uppercase the character according to the CTYPE locale.