source: trunk/yao/share/antlr-2.7.7/examples/java/heteroAST/Main.java @ 1

import java.io.*;
import antlr.CommonAST;
import antlr.collections.AST;

class Main {
        public static void main(String[] args) {
                new INTNode();
                try {
                        CalcLexer lexer = new CalcLexer(new DataInputStream(System.in));
                        CalcParser parser = new CalcParser(lexer);
                        // Parse the input expression
                        parser.expr();
                        CalcAST t = (CalcAST)parser.getAST();

                        // Print the resulting tree out in LISP notation
                        System.out.println(t.toStringTree());

                        // XML serialize the tree, showing
                        // different physical node class types
                        Writer w = new OutputStreamWriter(System.out);
                        t.xmlSerialize(w);
                        w.write("\n");
                        w.flush();

                        // Compute value and return
                        int r = t.value();
                        System.out.println("value is "+r);
                } catch(Exception e) {
                        System.err.println("exception: "+e);
                        e.printStackTrace();
                }
        }
}