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GHC.Unicode | Portability | non-portable (GHC extensions) | Stability | internal | Maintainer | cvs-ghc@haskell.org |
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Description |
Implementations for the character predicates (isLower, isUpper, etc.)
and the conversions (toUpper, toLower). The implementation uses
libunicode on Unix systems if that is available.
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Synopsis |
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Documentation |
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isAscii :: Char -> Bool |
Selects the first 128 characters of the Unicode character set,
corresponding to the ASCII character set.
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isLatin1 :: Char -> Bool |
Selects the first 256 characters of the Unicode character set,
corresponding to the ISO 8859-1 (Latin-1) character set.
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isControl :: Char -> Bool |
Selects control characters, which are the non-printing characters of
the Latin-1 subset of Unicode.
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isAsciiUpper :: Char -> Bool |
Selects ASCII upper-case letters,
i.e. characters satisfying both isAscii and isUpper.
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isAsciiLower :: Char -> Bool |
Selects ASCII lower-case letters,
i.e. characters satisfying both isAscii and isLower.
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isPrint :: Char -> Bool |
Selects printable Unicode characters
(letters, numbers, marks, punctuation, symbols and spaces).
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isSpace :: Char -> Bool |
Selects white-space characters in the Latin-1 range.
(In Unicode terms, this includes spaces and some control characters.)
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isUpper :: Char -> Bool |
Selects upper-case or title-case alphabetic Unicode characters (letters).
Title case is used by a small number of letter ligatures like the
single-character form of Lj.
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isLower :: Char -> Bool |
Selects lower-case alphabetic Unicode characters (letters).
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isAlpha :: Char -> Bool |
Selects alphabetic Unicode characters (lower-case, upper-case and
title-case letters, plus letters of caseless scripts and modifiers letters).
This function is equivalent to Data.Char.isLetter.
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isDigit :: Char -> Bool |
Selects ASCII digits, i.e. '0'..'9'.
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isOctDigit :: Char -> Bool |
Selects ASCII octal digits, i.e. '0'..'7'.
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isHexDigit :: Char -> Bool |
Selects ASCII hexadecimal digits,
i.e. '0'..'9', 'a'..'f', 'A'..'F'.
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isAlphaNum :: Char -> Bool |
Selects alphabetic or numeric digit Unicode characters.
Note that numeric digits outside the ASCII range are selected by this
function but not by isDigit. Such digits may be part of identifiers
but are not used by the printer and reader to represent numbers.
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toUpper :: Char -> Char |
Convert a letter to the corresponding upper-case letter, if any.
Any other character is returned unchanged.
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toLower :: Char -> Char |
Convert a letter to the corresponding lower-case letter, if any.
Any other character is returned unchanged.
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toTitle :: Char -> Char |
Convert a letter to the corresponding title-case or upper-case
letter, if any. (Title case differs from upper case only for a small
number of ligature letters.)
Any other character is returned unchanged.
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wgencat :: CInt -> CInt |
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Produced by Haddock version 2.2.2 |