Is it possible to inspect the state stack in helper functions?

[retorquere]

I want to peek into the state stack in my helper functions. I can see I have access to the parser as "parser", and this does have a member "lexer", but that in turn does not have a member "conditionStack" as I would have expected.

[just-boris]

+1 I want to get better error messages from parser, instead of string message.
If I could get current match from lexer and current stack, I would make a better suggestion for my users how to fix a syntax error