, isLower, isUpper, isAlpha, isAlphaNum, isPrint
, isDigit, isOctDigit, isHexDigit
, isAsciiUpper, isAsciiLower
-#ifndef __NHC__
, isLetter, isMark, isNumber, isPunctuation, isSymbol, isSeparator
, GeneralCategory(..), generalCategory
-#endif
-- * Case conversion
, toUpper, toLower, toTitle -- :: Char -> Char