// This file is automatically generated by DemeterJ.

EqualVisitor {
  {{
    private java.util.Stack history = new java.util.Stack();
    public EqualVisitor(Object obj) {
      history.push(obj);
    }
  }}

  before Main {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    Object temp1 = host.get_s();
    Object temp2 = ((Main) obj).get_s();
    if(temp1 == null && temp2 == null) {}
    else if(temp1 == null ||
            temp2 == null ||
            !temp1.equals(temp2)) { is_equal = false; return; }
  }}

  before -> Ex, first, Nonempty_Ex {{
    if (is_equal) {
      Ex obj = (Ex) history.peek();
      Object temp3 = obj.get_first();
      if(temp3==null) { is_equal = false; return; }
      history.push(temp3);
    }
  }}
  after -> Ex, first, Nonempty_Ex {{
    if (is_equal) history.pop();
  }}

  before Ex {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}

  before -> Expression, first, Nonempty_Expression {{
    if (is_equal) {
      Expression obj = (Expression) history.peek();
      Object temp4 = obj.get_first();
      if(temp4==null) { is_equal = false; return; }
      history.push(temp4);
    }
  }}
  after -> Expression, first, Nonempty_Expression {{
    if (is_equal) history.pop();
  }}

  before Expression {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}

  before -> Term, first, Nonempty_Term {{
    if (is_equal) {
      Term obj = (Term) history.peek();
      Object temp5 = obj.get_first();
      if(temp5==null) { is_equal = false; return; }
      history.push(temp5);
    }
  }}
  after -> Term, first, Nonempty_Term {{
    if (is_equal) history.pop();
  }}

  before Term {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}

  before Factor {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}

  before -> Compound, expression, Expression {{
    if (is_equal) {
      Compound obj = (Compound) history.peek();
      Object temp6 = obj.get_expression();
      if(temp6==null) { is_equal = false; return; }
      history.push(temp6);
    }
  }}
  after -> Compound, expression, Expression {{
    if (is_equal) history.pop();
  }}

  before Compound {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}

  before Variable {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    Object temp7 = host.get_ident();
    Object temp8 = ((Variable) obj).get_ident();
    if(temp7 == null && temp8 == null) {}
    else if(temp7 == null ||
            temp8 == null ||
            !temp7.equals(temp8)) { is_equal = false; return; }
  }}

  before PrintVisitor {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    is_equal = is_equal && host.get_indent() == ((PrintVisitor) obj).get_indent();
    is_equal = is_equal && host.get_needSpace() == ((PrintVisitor) obj).get_needSpace();
  }}

  before CopyVisitor {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    Object temp9 = host.get_copy();
    Object temp10 = ((CopyVisitor) obj).get_copy();
    if(temp9 == null && temp10 == null) {}
    else if(temp9 == null ||
            temp10 == null ||
            !temp9.equals(temp10)) { is_equal = false; return; }
  }}

  before SubgraphVisitor {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    is_equal = is_equal && host.get_is_equal() == ((SubgraphVisitor) obj).get_is_equal();
  }}

  before EqualVisitor {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    is_equal = is_equal && host.get_is_equal() == ((EqualVisitor) obj).get_is_equal();
  }}

  before DisplayVisitor {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    is_equal = is_equal && host.get_indent() == ((DisplayVisitor) obj).get_indent();
  }}

  before TraceVisitor {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
    is_equal = is_equal && host.get_indent() == ((TraceVisitor) obj).get_indent();
  }}

  before UniversalVisitor {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}

  before -> Nonempty_Ex, it, Expression {{
    if (is_equal) {
      Nonempty_Ex obj = (Nonempty_Ex) history.peek();
      Object temp11 = obj.get_it();
      if(temp11==null) { is_equal = false; return; }
      history.push(temp11);
    }
  }}
  after -> Nonempty_Ex, it, Expression {{
    if (is_equal) history.pop();
  }}

  before -> Nonempty_Ex, next, Nonempty_Ex {{
    if (is_equal) {
      Nonempty_Ex obj = (Nonempty_Ex) history.peek();
      Object temp12 = obj.get_next();
      if(temp12==null) { is_equal = false; return; }
      history.push(temp12);
    }
  }}
  after -> Nonempty_Ex, next, Nonempty_Ex {{
    if (is_equal) history.pop();
  }}

  before Nonempty_Ex {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}

  before -> Nonempty_Expression, it, Term {{
    if (is_equal) {
      Nonempty_Expression obj = (Nonempty_Expression) history.peek();
      Object temp13 = obj.get_it();
      if(temp13==null) { is_equal = false; return; }
      history.push(temp13);
    }
  }}
  after -> Nonempty_Expression, it, Term {{
    if (is_equal) history.pop();
  }}

  before -> Nonempty_Expression, next, Nonempty_Expression {{
    if (is_equal) {
      Nonempty_Expression obj = (Nonempty_Expression) history.peek();
      Object temp14 = obj.get_next();
      if(temp14==null) { is_equal = false; return; }
      history.push(temp14);
    }
  }}
  after -> Nonempty_Expression, next, Nonempty_Expression {{
    if (is_equal) history.pop();
  }}

  before Nonempty_Expression {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}

  before -> Nonempty_Term, it, Factor {{
    if (is_equal) {
      Nonempty_Term obj = (Nonempty_Term) history.peek();
      Object temp15 = obj.get_it();
      if(temp15==null) { is_equal = false; return; }
      history.push(temp15);
    }
  }}
  after -> Nonempty_Term, it, Factor {{
    if (is_equal) history.pop();
  }}

  before -> Nonempty_Term, next, Nonempty_Term {{
    if (is_equal) {
      Nonempty_Term obj = (Nonempty_Term) history.peek();
      Object temp16 = obj.get_next();
      if(temp16==null) { is_equal = false; return; }
      history.push(temp16);
    }
  }}
  after -> Nonempty_Term, next, Nonempty_Term {{
    if (is_equal) history.pop();
  }}

  before Nonempty_Term {{
    Object obj = history.peek();
    is_equal = is_equal && obj.getClass().equals(host.getClass());
    if(!is_equal) return;
  }}

  return boolean {{ is_equal }}
}