public static void Main(string[] args)
{
new INTNode();
try {
CalcLexer lexer = new CalcLexer(new ByteBuffer(Console.OpenStandardInput()));
CalcParser parser = new CalcParser(lexer);
// Parse the input expression
parser.expr();
CalcAST t = (CalcAST)parser.getAST();
// Print the resulting tree out in LISP notation
Console.Out.WriteLine(t.ToStringTree());
// XML serialize the tree, showing
// different physical node class types
TextWriter w = Console.Out;
t.xmlSerialize(w);
w.Write("\n");
w.Flush();
// Compute value and return
int r = t.Value();
Console.Out.WriteLine("value is " + r);
} catch (Exception e) {
Console.Error.WriteLine("exception: " + e);
Console.Error.WriteLine(e.StackTrace);
}
}
public CalcAST Right()
{
CalcAST t = Left();
if (t == null)
{
return(null);
}
return((CalcAST)t.getNextSibling());
}