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.
|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.)
|Produced by Haddock version 2.3.0|