Handle intrinsically circular grammars by parser-combinators decomposed to a set of modules.

[magniff]

In documentation you introduced an example of JSON parser, this format considered to be intrinsically circular on grammar level. So, what if my grammar has circular nature just like json`s one, but parsers spread to several modules, hence I have circular modules imports. Is there any built-in way to handle this?

[vlasovskikh]

I'm not sure it's a problem encountered by many funcparserlib users. I'll leave this open until we see more people requesting this feature.