private void nextToken() { _currentToken = _peekToken; _peekToken = _lexer.NextToken(); ParserTracing.Token( $"current token is now {_currentToken?.Type ?? TokenType.ILLEGAL} ({_currentToken?.Literal ?? ""})"); ParserTracing.Token( $"peek token is now {_peekToken?.Type ?? TokenType.ILLEGAL} ({_peekToken?.Literal ?? ""})"); }