Understanding grammar in SableCC

Question

I am going through sableCC for one of my projects and I have few queries about the Grammar file. 1. What is the difference between Helper and Tokens? 2. What should go in helper and Token? 3. And most importantly what is Productions?

Answer 1

you can see the thesis here

Token : lexical defnitions for numbers, arithmetic op- erators, parentheses and blanks etc.

helper : is a character set or a regular expression denoted by an identifer.

Productions : is a grammar that you define for identify.