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

[Aditya Mahajan]

On Tue, 28 Jun 2011, Christophe Jorssen wrote:

> Hello all,
>
> I posted the following question to the lua list a week ago but got no
> answer. So I try here... For sure, it is a bit out of topic (well, it
> is remotely connected with some work on a lua way to perform math in
> pgf) but I know there must be some lpeg (context?) wizards here who
> could probably help me on this matter. Thanks in advance. Best
> regards.

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.

Aditya