Safe Haskell	Safe
Language	Haskell98

Text.XML.HaXml.Posn

Contents

Position type

Description

Define a position datatype for giving locations in error messages.

Synopsis

data Posn
posInNewCxt :: String -> Maybe Posn -> Posn
noPos :: Posn
forcep :: Posn -> Int
addcol :: Int -> Posn -> Posn
newline :: Posn -> Posn
tab :: Posn -> Posn
white :: Char -> Posn -> Posn
posnFilename :: Posn -> FilePath
posnLine :: Posn -> Int
posnColumn :: Posn -> Int

Position type

data Posn Source #

Source positions contain a filename, line, column, and an inclusion point, which is itself another source position, recursively.

Instances

Eq Posn Source #
Instance details Defined in Text.XML.HaXml.Posn Methods (==) :: Posn -> Posn -> Bool # (/=) :: Posn -> Posn -> Bool #
Show Posn Source #
Instance details Defined in Text.XML.HaXml.Posn Methods showsPrec :: Int -> Posn -> ShowS # show :: Posn -> String # showList :: [Posn] -> ShowS #

Constructors of a new position

posInNewCxt :: String -> Maybe Posn -> Posn Source #

posInNewCxt name pos creates a new source position from an old one. It is used when opening a new file (e.g. a DTD inclusion), to denote the start of the file name, but retain the stacked information that it was included from the old pos.

noPos :: Posn Source #

Dummy value for generated data, where a true source position does not exist.