HaXml-1.25.4: Utilities for manipulating XML documents

Safe HaskellSafe
LanguageHaskell98

Text.XML.HaXml.Xtract.Lex

Description

This is another hand-written lexer, this time for the Xtract command-language. The entry point is lexXtract. You don't normally need to use this module directly - the lexer is called automatically by the parser. (We only expose this interface for debugging purposes.)

The Xtract command language is very like the XPath specification.

Synopsis

Documentation

lexXtract :: (String -> String) -> String -> [Token] #

First argument is a transformer for pattern strings, e.g. map toLower, but only applying to parts of the pattern not in quotation marks. (Needed to canonicalise HTML where tags are case-insensitive, but attribute values are case sensitive.)

data Posn #

Constructors

Pn Int 

Instances

Eq Posn # 

Methods

(==) :: Posn -> Posn -> Bool #

(/=) :: Posn -> Posn -> Bool #

Show Posn # 

Methods

showsPrec :: Int -> Posn -> ShowS #

show :: Posn -> String #

showList :: [Posn] -> ShowS #

data TokenT #

Instances

Eq TokenT # 

Methods

(==) :: TokenT -> TokenT -> Bool #

(/=) :: TokenT -> TokenT -> Bool #

Show TokenT #