[augeas-devel] XML lens parse_error with XML document using single quotes

[Francis Giraldeau]

Le lundi 07 novembre 2011 à 21:53 -0500, Alan Evans a écrit :
> I noticed the problem when parsing a document with a prolog like the
> following augeas gives a parse_error.
> 
> <?xml version='1.0'?>
> 
> If I manually replace the single quotes with double quotes augeas
> likes the document just fine.

You're right. This is a limitation of the current lens. Here is the
comment from the lens:

(* if we hide the quotes, then we can only accept single or double 
   quotes otherwise a put ambiguity is raised *)

The put ambiguity is raised because for the same tree, two lenses match.
One way to overcome this would be to accept malformed files, where a
quote may not be balanced i.e. att="var'. 

let example = [ key /[a-z]+/ . dels "=" . del /["']/ "\"" .
store /[a-z]*/ . del /["']/ "\"" ]

Maybe a lens like the square lens, but that acts as a del with
characters at extremity? Or quotient lens?

Francis