(function jsonExample() {

  // ----------------- Lexer -----------------

  var extendToken = chevrotain.extendToken;

  var Lexer = chevrotain.Lexer;

​

  // In ES6, custom inheritance implementation

  // (such as the one above) can be replaced

  // with a more simple: "class X extends Y"...

  var True = extendToken("True", /true/);

  var False = extendToken("False", /false/);

  var Null = extendToken("Null", /null/);

  var LCurly = extendToken("LCurly", /{/);

  var RCurly = extendToken("RCurly", /}/);

  var LSquare = extendToken("LSquare", /\[/);

  var RSquare = extendToken("RSquare", /]/);

  var Comma = extendToken("Comma", /,/);

  var Colon = extendToken("Colon", /:/);

  var StringLiteral = extendToken("StringLiteral",

    /"(:?[^\\"\n\r]+|\\(:?[bfnrtv"\\/]|u[0-9a-fA-F]{4}))*"/);

  var NumberLiteral = extendToken("NumberLiteral",

    /-?(0|[1-9]\d*)(\.\d+)?([eE][+-]?\d+)?/);

  var WhiteSpace = extendToken("WhiteSpace", /\s+/);

  WhiteSpace.GROUP = Lexer.SKIPPED;

​

​

  var jsonTokens = [WhiteSpace, NumberLiteral, StringLiteral, RCurly, LCurly,

    LSquare, RSquare, Comma, Colon, True, False, Null];

​

  var ChevJsonLexer = new Lexer(jsonTokens, true);

​

  // ----------------- parser -----------------

  var ChevrotainParser = chevrotain.Parser;

​

  function ChevrotainJsonParser(input) {

    ChevrotainParser.call(this, input, jsonTokens);

    var $ = this;

​

    this.json = this.RULE("json", function () {

      // @formatter:off

      return $.OR([

        { ALT: function () { return $.SUBRULE($.object) }},

        { ALT: function () { return $.SUBRULE($.array) }}

      ]);

      // @formatter:on

    });

​

    this.object = this.RULE("object", function () {

      // use debugger statements to add breakpoints

      // (if your browser supports debugging evaluated code)