* On 2010-11-18 Wesley Smith <wesley.hoke@gmail.com> wrote :
I too found LPEG mysterious at first. It took a lot of playing around
with it before it really made sense. The thing that confused me the
most was the V grammar rule function, but in the end I was over
thinking it. For someone who is not familiar with PEG and string
matching, the terminology looks really obscure. What I would suggest
is trying some really simple patterns without going in to grammars
until you feel more comfortable with LPEG. Try something dead simple
like matching patterns with 1 character, then 2 characters, then
generating a search in a larger string for those patterns. I think
this will help give you a taste of what LPEG is all about.
For what it's worth, my two cents. I totaly agree with this: It is very
possible to 'grow' a grammar by incrementally adding small pieces and
learning on the fly, testing the results every run to see what exactly
is going on. I had some troubles understanding a lot of details of the
LPEG grammar at first as well, but I was able to build a complete SIP
parser in a two or three days from the ground up, with no previous LPEG
experience at all.
