public static void Main(string[] args)
{
AntlrInputStream ain = new AntlrInputStream("(a b cd ef (ged))");
SExprLexer lexer = new SExprLexer(ain);
BufferedTokenStream tokens = new BufferedTokenStream(lexer);
tokens.Fill();
SExprParser parser = new SExprParser(tokens);
Console.WriteLine(parser.main());
}
