Implement a extension of PEG

[petrolifero]

https://www.youtube.com/watch?v=4QrZxfgZFDg

This is a very future function.

With this, will be possible to parse declaratively and easyly all of C, python and other syntax-ambiguous languages.

[rain-1]

Good video.

I think we may be able to implement this without a symbol table, just having a way to use the result of an earlier match as a string to match maybe.

[petrolifero]

Why don't use a parameter that is a list of hash or something like this? (If we use a hash purely, don't will be possible to manage the block directive