[Petal] Attributes with dashes

[Bruno Postle]

On Tue 04-Jan-2005 at 15:55 +0100, Olaf Buwen wrote:
>
> "tal:attributes='foo-bar data/foo/bar'" does not work, although XML 
> allows attributes with dashes.
>
> As a workaround, I modified the regular expression in
> Petal/Canonicalizer/XML.pm, line 547 from

>      /^\s*((?:\w|\:)+)\s+(.*?)\s*$/
> to
>      /^\s*((?:[-\w]|\:)+)\s+(.*?)\s*$/

It would be nice if either regex matched the XML specification for 
attribute names.  Petal could generate attributes like these which 
I'm sure are not within the XML spec:

      -foo="whatever"
      --bar="whatever"

This might also cause trouble with the "--value" system for passing 
arguments to methods.

Also I think this is a valid XML attribute:

    foo_2.BAR="whatever"

So the regex needs to look something like this:

     /^\s*([A-Za-z_:][A-Za-z0-9_:.-]*)\s+(.*?)\s*$/

Comments?  I'm no regular expression guru.

-- 
Bruno