code: function Tokenizer(str) {
  
      this.str = (str || '').toString();
      this.operatorCurrent = '';
      this.operatorExpecting = '';
      this.node = null;
      this.escaped = false;
  
      this.list = [];
  
  }
docs: Creates a Tokenizer object for tokenizing address field strings
  
  @constructor
  @param {String} str Address field string