| Safe Haskell | Safe |
|---|---|
| Language | Haskell98 |
Char
- 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 -> Bool Source
Selects the first 128 characters of the Unicode character set, corresponding to the ASCII character set.
isLatin1 :: Char -> Bool Source
Selects the first 256 characters of the Unicode character set, corresponding to the ISO 8859-1 (Latin-1) character set.
isControl :: Char -> Bool Source
Selects control characters, which are the non-printing characters of the Latin-1 subset of Unicode.
isPrint :: Char -> Bool Source
Selects printable Unicode characters (letters, numbers, marks, punctuation, symbols and spaces).
isSpace :: Char -> Bool Source
Returns True for any Unicode space character, and the control
characters \t, \n, \r, \f, \v.
isUpper :: Char -> Bool Source
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.
isAlpha :: Char -> Bool Source
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 isLetter.
isOctDigit :: Char -> Bool Source
Selects ASCII octal digits, i.e. '0'..'7'.
isHexDigit :: Char -> Bool Source
Selects ASCII hexadecimal digits,
i.e. '0'..'9', 'a'..'f', 'A'..'F'.
isAlphaNum :: Char -> Bool Source
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 -> Int Source
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 -> Char Source
toUpper :: Char -> Char Source
Convert a letter to the corresponding upper-case letter, if any. Any other character is returned unchanged.
toLower :: Char -> Char Source
Convert a letter to the corresponding lower-case letter, if any. Any other character is returned unchanged.
readLitChar :: ReadS Char Source
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 -> ShowS Source
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 String Source
Read a string representation of a character, using Haskell source-language escape conventions. For example:
lexLitChar "\\nHello" = [("\\n", "Hello")]data Char