haskell98-1.0.1.1: Compatibility with Haskell 98Source codeContentsIndex
Char
Synopsis
isAscii :: Char -> Bool
isLatin1 :: Char -> Bool
isControl :: Char -> Bool
isPrint :: Char -> Bool
isSpace :: Char -> Bool
isUpper :: Char -> Bool
isLower :: Char -> Bool
isAlpha :: Char -> Bool
isDigit :: Char -> Bool
isOctDigit :: Char -> Bool
isHexDigit :: Char -> Bool
isAlphaNum :: Char -> Bool
digitToInt :: Char -> Int
intToDigit :: Int -> Char
toUpper :: Char -> Char
toLower :: Char -> Char
ord :: Char -> Int
chr :: Int -> Char
readLitChar :: ReadS Char
showLitChar :: Char -> ShowS
lexLitChar :: ReadS String
data Char
type String = [Char]
Documentation
isAscii :: Char -> BoolSource
Selects the first 128 characters of the Unicode character set, corresponding to the ASCII character set.
isLatin1 :: Char -> BoolSource
Selects the first 256 characters of the Unicode character set, corresponding to the ISO 8859-1 (Latin-1) character set.
isControl :: Char -> BoolSource
Selects control characters, which are the non-printing characters of the Latin-1 subset of Unicode.
isPrint :: Char -> BoolSource
Selects printable Unicode characters (letters, numbers, marks, punctuation, symbols and spaces).
isSpace :: Char -> BoolSource
Selects white-space characters in the Latin-1 range. (In Unicode terms, this includes spaces and some control characters.)
isUpper :: Char -> BoolSource
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.
isLower :: Char -> BoolSource
Selects lower-case alphabetic Unicode characters (letters).
isAlpha :: Char -> BoolSource
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.
isDigit :: Char -> BoolSource
Selects ASCII digits, i.e. '0'..'9'.
isOctDigit :: Char -> BoolSource
Selects ASCII octal digits, i.e. '0'..'7'.
isHexDigit :: Char -> BoolSource
Selects ASCII hexadecimal digits, i.e. '0'..'9', 'a'..'f', 'A'..'F'.
isAlphaNum :: Char -> BoolSource

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.

digitToInt :: Char -> IntSource
Convert a single digit Char to the corresponding Int. This function fails unless its argument satisfies isHexDigit, but recognises both upper and lower-case hexadecimal digits (i.e. '0'..'9', 'a'..'f', 'A'..'F').
intToDigit :: Int -> CharSource
Convert an Int in the range 0..15 to the corresponding single digit Char. This function fails on other inputs, and generates lower-case hexadecimal digits.
toUpper :: Char -> CharSource
Convert a letter to the corresponding upper-case letter, if any. Any other character is returned unchanged.
toLower :: Char -> CharSource
Convert a letter to the corresponding lower-case letter, if any. Any other character is returned unchanged.
ord :: Char -> IntSource
The Prelude.fromEnum method restricted to the type Data.Char.Char.
chr :: Int -> CharSource
The Prelude.toEnum method restricted to the type Data.Char.Char.
readLitChar :: ReadS CharSource

Read a string representation of a character, using Haskell source-language escape conventions, and convert it to the character that it encodes. For example:

readLitChar "\\nHello" = [('\n', "Hello")]
showLitChar :: Char -> ShowSSource

Convert a character to a string using only printable characters, using Haskell source-language escape conventions. For example:

showLitChar '\n' s = "\\n" ++ s
lexLitChar :: ReadS StringSource

Read a string representation of a character, using Haskell source-language escape conventions. For example:

lexLitChar "\\nHello" = [("\\n", "Hello")]
data Char Source
show/hide Instances
type String = [Char]Source
A String is a list of characters. String constants in Haskell are values of type String.
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