如果解析器和词法分析器在单独的包中，它们如何协同工作？

This question concerns Antlr, the parser/lexer generator (Which is pretty awesome IMO). Specifically, the version in question is Antlr4. Currently I'm playing around trying to create a parser/lexer combo in separate files, which worked well at first.This question concerns Antlr, the parser/lexer