core:

import edu.neu.ccs.demeter.*;
add: class Main {
  public constructor Main() {{
    super();
  }}
  public static Main parse(java.io.Reader in)
    throws ParseException
  {{ return new Parser(in)._Main(); }}
  public static Main parse(java.io.InputStream in)
    throws ParseException
  {{ return new Parser(in)._Main(); }}
  public static Main parse(String s) {{
    try { return parse(new java.io.StringReader(s)); }
    catch (ParseException e) {
      throw new RuntimeException(e.toString());
    }
  }}
  public static void main(String args[]) throws Exception {{
    ShoeOrder m = ShoeOrder.parse(System.in);
    System.out.println("Print input: with concrete syntax");
    m.print();
    System.out.println();
    System.out.println("Display input: no concrete syntax");
    m.display();
    System.out.println();
    System.out.println("Show effect of TraceVisitor: where have we been?");
    m.trace();
    System.out.println();
    ShoeOrder s = m.copy();
    System.out.println();
    System.out.println(m);
    System.out.println("Copyed object");
    System.out.println();
    s.display();
    System.out.println();
    System.out.println("Is the copy the same as the original?");
    System.out.println( s.equal(m));
    System.out.println();
    System.out.println("Total");
    System.out.println(s.sum());
    System.out.println("Total with debugging");
    System.out.println(s.sumWithDebugging());
  }}
{{  void universal_trv0_bef(UniversalVisitor _v_) {
    ((UniversalVisitor) _v_).before(this);
  }
}}
{{  void universal_trv0_aft(UniversalVisitor _v_) {
    ((UniversalVisitor) _v_).after(this);
  }
}}
{{  void universal_trv0(UniversalVisitor _v_) {
    universal_trv0_bef(_v_);
    universal_trv0_aft(_v_);
  }
}}
}