code: function(str){
      var lines = str.match(/\n/g)
        , idx = str.lastIndexOf('\n');
  
      if (lines) this.lineno += lines.length;
      this.column = ~idx
        ? str.length - idx
        : this.column + str.length;
    }
docs: Move current line and column position.
  
  @param {String} str
  @api private