isSpace -package:base

Fast predicate for matching ASCII space characters. Note: This predicate only gives correct answers for the ASCII encoding. For instance, it does not recognise U+00A0 (non-breaking space) as a space character, even though it is a valid ISO-8859-15 byte. For a Unicode-aware and only slightly slower predicate, use isSpace

Returns True for any Unicode space character, and the control characters \t, \n, \r, \f, \v.

Fast Word8 predicate for matching ASCII space characters

isSpace w = w == 32 || w - 9 <= 4

Selects Unicode space characters (general category Space), and the control characters \t, \n, \r, \f, \v. Note: isSpace is not equivalent to isWhiteSpace. isWhiteSpace selects the same characters from isSpace plus the following:

• U+0085 NEXT LINE (NEL)
• U+2028 LINE SEPARATOR
• U+2029 PARAGRAPH SEPARATOR

isSpace c == Data.Char.isSpace c

Selects white-space characters in the Latin-1 range

Selects words corresponding to white-space characters in the Latin-1 range

Fast Word8 predicate for matching ASCII space characters.

Is this white-space? Only works for the Latin1 subset, otherwise returns sFalse.

Test if a character is the SPACE or the TAB character.

Test if a byte is the encoding of the SPACE or the TAB character.

Type class for types which can be safely cast to SpaceDrawer, for instance with toSpaceDrawer.

Determines whether a character is a space, tab, or line separator (newline, carriage return, etc.). Given some UTF-8 text, obtain a character value with utf8GetChar. (Note: don't use this to do word breaking; you have to use Pango or equivalent to get word breaking right, the algorithm is fairly complex.)