question: protected void read_lookahead ( ) throws java . lang . Exception { lookahead = new Symbol [ error_sync_size ( ) ] ; for ( int i = 0 ; i < error_sync_size ( ) ; i ++ ) { lookahead [ i ] = cur_token ; cur_token = scan ( ) ; } lookahead_pos = 0 ; }
target:  Read from input to establish our buffer of "parse ahead" lookahead  Symbols. 