| Copyright | Copyright (C) 2008 Uwe Schmidt |
|---|---|
| License | MIT |
| Maintainer | Uwe Schmidt (uwe@fh-wedel.de) |
| Stability | experimental |
| Portability | portable |
| Safe Haskell | Safe-Inferred |
| Language | Haskell2010 |
Text.XML.HXT.Arrow.XmlRegex
Description
Regular Expression Matcher working on lists of XmlTrees
It's intended to import this module with an explicit import declaration for not spoiling the namespace with these somewhat special arrows
Synopsis
- data XmlRegex
- mkZero :: String -> XmlRegex
- mkUnit :: XmlRegex
- mkPrim :: (XmlTree -> Bool) -> XmlRegex
- mkPrim' :: (XmlTree -> Bool) -> String -> XmlRegex
- mkPrimA :: LA XmlTree XmlTree -> XmlRegex
- mkDot :: XmlRegex
- mkStar :: XmlRegex -> XmlRegex
- mkAlt :: XmlRegex -> XmlRegex -> XmlRegex
- mkAlts :: [XmlRegex] -> XmlRegex
- mkSeq :: XmlRegex -> XmlRegex -> XmlRegex
- mkSeqs :: [XmlRegex] -> XmlRegex
- mkRep :: Int -> XmlRegex -> XmlRegex
- mkRng :: Int -> Int -> XmlRegex -> XmlRegex
- mkOpt :: XmlRegex -> XmlRegex
- mkPerm :: XmlRegex -> XmlRegex -> XmlRegex
- mkPerms :: [XmlRegex] -> XmlRegex
- mkMerge :: XmlRegex -> XmlRegex -> XmlRegex
- nullable :: XmlRegex -> Bool
- delta :: XmlRegex -> XmlTree -> XmlRegex
- matchXmlRegex :: XmlRegex -> XmlTrees -> Maybe String
- splitXmlRegex :: XmlRegex -> XmlTrees -> Maybe (XmlTrees, XmlTrees)
- scanXmlRegex :: XmlRegex -> XmlTrees -> Maybe [XmlTrees]
- matchRegexA :: XmlRegex -> LA XmlTree XmlTree -> LA XmlTree XmlTrees
- splitRegexA :: XmlRegex -> LA XmlTree XmlTree -> LA XmlTree (XmlTrees, XmlTrees)
- scanRegexA :: XmlRegex -> LA XmlTree XmlTree -> LA XmlTree XmlTrees
Documentation
matchXmlRegex :: XmlRegex -> XmlTrees -> Maybe String Source #
match a sequence of XML trees with a regular expression over trees
If the input matches, the result is Nothing, else Just an error message is returned
splitXmlRegex :: XmlRegex -> XmlTrees -> Maybe (XmlTrees, XmlTrees) Source #
split a sequence of XML trees into a pair of a a matching prefix and a rest
If there is no matching prefix, Nothing is returned
scanXmlRegex :: XmlRegex -> XmlTrees -> Maybe [XmlTrees] Source #
scan a sequence of XML trees and split it into parts matching the given regex
If the parts cannot be split because of a missing match, or because of the empty sequence as match, Nothing is returned
splitRegexA :: XmlRegex -> LA XmlTree XmlTree -> LA XmlTree (XmlTrees, XmlTrees) Source #
split the sequence of trees computed by the filter a into
The arrow for splitXmlRegex.
a first part matching the regex and a rest, if a prefix of the input sequence does not match the regex, the arrow fails else the pair containing the result lists is returned