http://slideplayer.fr/1313380/3/images/27/void+match%28int+t%29+%7B+if+%28lookahead+%3D%3D+t%29+lookahead+%3D+lexan%28%29%3B+else+error%28+syntax+error+%29%3B+%7D+%2F%2A%2A%2A%2A%2A%2A%2A%2A+symbol.c+%2A%2A%2A%2A%2A%2A%2A%2A%2A%2A%2A%2A%2F.jpg