How to use the chevrotain.CstParser function in chevrotain

var chevrotain = require("chevrotain")

// ----------------- lexer -----------------
var createToken = chevrotain.createToken
var Lexer = chevrotain.Lexer
var CstParser = chevrotain.CstParser

var True = createToken({ name: "True", pattern: /true/ })
var False = createToken({ name: "False", pattern: /false/ })
var Null = createToken({ name: "Null", pattern: /null/ })
var LCurly = createToken({ name: "LCurly", pattern: /{/ })
var RCurly = createToken({ name: "RCurly", pattern: /}/ })
var LSquare = createToken({ name: "LSquare", pattern: /\[/ })
var RSquare = createToken({ name: "RSquare", pattern: /]/ })
var Comma = createToken({ name: "Comma", pattern: /,/ })
var Colon = createToken({ name: "Colon", pattern: /:/ })
var StringLiteral = createToken({
  name: "StringLiteral",
  pattern: /"(?:[^\\"]|\\(?:[bfnrtv"\\/]|u[0-9a-fA-F]{4}))*"/
})
var NumberLiteral = createToken({
  name: "NumberLiteral",

"use strict"
// Written Docs for this tutorial step can be found here:
// https://github.com/SAP/chevrotain/blob/master/docs/tutorial/step2_parsing.md

// Tutorial Step 2:

// Adding a Parser (grammar only, only reads the input without any actions).
// Using the Token Vocabulary defined in the previous step.

const selectLexer = require("../step1_lexing/step1_lexing")
const CstParser = require("chevrotain").CstParser
const tokenVocabulary = selectLexer.tokenVocabulary

// individual imports, prefer ES6 imports if supported in your runtime/transpiler...
const Select = tokenVocabulary.Select
const From = tokenVocabulary.From
const Where = tokenVocabulary.Where
const Identifier = tokenVocabulary.Identifier
const Integer = tokenVocabulary.Integer
const GreaterThan = tokenVocabulary.GreaterThan
const LessThan = tokenVocabulary.LessThan
const Comma = tokenVocabulary.Comma

// ----------------- parser -----------------
class SelectParser extends CstParser {
  constructor() {
    super(tokenVocabulary)

"use strict"

const chevrotain = require("chevrotain")

// ----------------- lexer -----------------
const createToken = chevrotain.createToken
const Lexer = chevrotain.Lexer
const CstParser = chevrotain.CstParser

const True = createToken({ name: "True", pattern: /true/ })
const False = createToken({ name: "False", pattern: /false/ })
const Null = createToken({ name: "Null", pattern: /null/ })
const LCurly = createToken({ name: "LCurly", pattern: /{/ })
const RCurly = createToken({ name: "RCurly", pattern: /}/ })
const LSquare = createToken({ name: "LSquare", pattern: /\[/ })
const RSquare = createToken({ name: "RSquare", pattern: /]/ })
const Comma = createToken({ name: "Comma", pattern: /,/ })
const Colon = createToken({ name: "Colon", pattern: /:/ })
const StringLiteral = createToken({
  name: "StringLiteral",
  pattern: /"(?:[^\\"]|\\(?:[bfnrtv"\\/]|u[0-9a-fA-F]{4}))*"/
})
const NumberLiteral = createToken({
  name: "NumberLiteral",