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using System;
using System.IO;
using antlr;
using antlr.collections;
class HeteroMain {
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);
}
}
}
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