| Safe Haskell | Safe |
|---|---|
| Language | Haskell98 |
Text.XML.HaXml.Posn
Description
Define a position datatype for giving locations in error messages.
Position type
data Posn
Source positions contain a filename, line, column, and an inclusion point, which is itself another source position, recursively.
Constructors of a new position
posInNewCxt :: String -> Maybe Posn -> Posn
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.
Strictifier
Just used to strictify the internal values of a position, to avoid space leaks.
Modifiers
Add the given whitespace char to the given position.
Precondition: white c | isSpace c = True
Accessors
posnFilename :: Posn -> FilePath
posnColumn :: Posn -> Int