pub(all) struct CharInfo {
  codepoint : Int
  char : Char
  name : String
  category : GeneralCategory
  is_invisible : Bool
  is_bidi_control : Bool
} derive(
@moonbitlang/core/debug.Debug
Debug)

pub(all) enum GeneralCategory {
  Letter
  Mark
  Number
  Punctuation
  Symbol
  Separator
  Other
} derive(Eq, 
@moonbitlang/core/debug.Debug
Debug)

pub(all) struct UnicodeVersion {
  major : Int
  minor : Int
  update : Int
} derive(Eq, 
@moonbitlang/core/debug.Debug
Debug)

fn case_fold(input : String) -> String

fn combining_class(cp : Int) -> Int

fn decimal_zero(cp : Int) -> Int?

fn format_codepoint(cp : Int) -> String

fn get_general_category(cp : Int) -> GeneralCategory

fn has_bidi_controls(input : String) -> Bool

fn has_bidi_override(input : String) -> Bool

fn has_invisible_characters(input : String) -> Bool

fn hex_char(digit : Int) -> Char

fn identifier_status_allowed(cp : Int) -> Bool

fn is_ascii(cp : Int) -> Bool

fn is_bidi_control_codepoint(cp : Int) -> Bool

fn is_bidi_override_codepoint(cp : Int) -> Bool

fn is_default_ignorable(cp : Int) -> Bool

fn is_invisible_codepoint(cp : Int) -> Bool

fn normalize_nfd(input : String) -> String

fn script_extensions(cp : Int) -> Array[String]

fn unicode_script(cp : Int) -> String

let unicode_version : UnicodeVersion