[luatex] [A bit out of topic] Extend the arithmetic expressions parser from lpeg example

[Christophe Jorssen]

2011/6/28 Aditya Mahajan <adityam at umich.edu>:
> On Tue, 28 Jun 2011, Christophe Jorssen wrote:
>
> You can also look at x-calcmath.(mkiv|lua) in ConTeXt distribution. That
> code is for converting "calculator math" to TeX rather than evaluating it,
> but it can give hints about parsing.
>

Thanks for the hint. It happens it had been my starting point for lpeg
grammar even before I had a look at Roberto's examples!

Best regards

-- 
Christophe