/* Production 36 */
  public void unary_expr() {
 /*@bgen(jjtree) unary_expr */
  ASTunary_expr jjtn000 = new ASTunary_expr(this, IDLParserTreeConstants.JJTUNARY_EXPR);
  bool jjtc000 = true;
  jjtree.openNodeScope(jjtn000);UnaryOps unary_op = UnaryOps.UnaryNone;
    try {
      switch ((jj_ntk==-1)?jj_ntk_calc():jj_ntk) {
      case 40:
      case 41:
      case 45:
        unary_op = unary_operator();
        break;
      default:
        jj_la1[43] = jj_gen;
        ;
        break;
      }
      primary_expr();
                                                   jjtree.closeNodeScope(jjtn000, true);
                                                   jjtc000 = false;
                                                   jjtn000.SetUnaryOperation(unary_op);
    } catch (Exception jjte000) {
    if (jjtc000) {
      jjtree.clearNodeScope(jjtn000);
      jjtc000 = false;
    } else {
      jjtree.popNode();
    }
  {if (true) throw ;}
    } finally {
    if (jjtc000) {
      jjtree.closeNodeScope(jjtn000, true);
    }
    }
  }
 /**
  * @see parser.IDLParserVisitor#visit(ASTunary_expr, Object)
  */
 public Object visit(ASTunary_expr node, Object data) {          
     // evaluate the primary-expr
     Literal result = (Literal)node.jjtGetChild(0).jjtAccept(this, data);
     switch (node.GetUnaryOperation()) {
         case UnaryOps.UnaryNegate:
             result.Negate();
             break;
         case UnaryOps.UnaryMinus:
             result.InvertSign();
             break;
         default:
             // for UnaryOps.Plus and UnaryOps.None: nothing to do
             break;
     }        
     return result;
 }