Data.Char8

Char8 library to be used with Data.ByteString.Char8. All function assumes that only 8bit part of Char is used and it is encoded in Latin-1 (ISO-8859-1). All utility functions are supposed to work as if those of Char. Exceptions are described in the function documentations.

Base library 4.7 (GHC 7.8) or earlier is based on Unicode 6. Base library 4.8 (GHC 7.10) or later is based on Unicode 7. isLower, isSymbol and isPunctuation behave differently.

Character classification

isControl :: Char -> Bool

isSpace :: Char -> Bool

isLower :: Char -> Bool

This function returns True for 170 and 186 in Unicode 6. But it returns False in Unicode 7.

isUpper :: Char -> Bool

isAlpha :: Char -> Bool

isAlphaNum :: Char -> Bool

isPrint :: Char -> Bool

isDigit :: Char -> Bool

isOctDigit :: Char -> Bool

isHexDigit :: Char -> Bool

isLetter :: Char -> Bool

isMark :: Char -> Bool

isNumber :: Char -> Bool

isPunctuation :: Char -> Bool

This function returns False for 167 and 182 in Unicode 6. But it returns True in Unicode 7.

isSymbol :: Char -> Bool

This function returns True for 167 and 182 in Unicode 6. But it returns False in Unicode 7.

isSeparator :: Char -> Bool

Subranges

isAscii :: Char -> Bool

isLatin1 :: Char -> Bool

isAsciiUpper :: Char -> Bool

isAsciiLower :: Char -> Bool

Case conversion

toUpper :: Char -> Char

Micro sign/mu (0xb5) and small letter Y with diaeresis (0xff) remain the same.

toLower :: Char -> Char

toTitle :: Char -> Char

Micro sign/mu (0xb5) and small letter Y with diaeresis (0xff) remain the same.