Am 23.02.2009 um 18:14 schrieb Mojca Miklavec:

> thanks a lot for the very nice code :) :) :)
>
> The second example (H_2^+) does not return expected result - it  
> should have been
>   H\lohi{2}{+}
> instead, but I don't require such cases for the current document, so I
> guess that I'll just replace the old macro with this one for now in
> order not to get distracted with TeX problems too much :)

You can try the attatched, it use lpeg to parse the content.

Wolfgang