protected override Boolean handleEmpty(EmptyStatementNode empty, HashSet <StatementNode> visited)
 {
     return(Boolean.TRUE);
 }
		public virtual Value evaluate(Context cx, EmptyStatementNode node)
		{
			//output("<EmptyStatementNode position=\"" + node.pos() + "\"/>");
			return null;
		}
 protected override Void handleEmpty(EmptyStatementNode empty, Void source)
 {
     return(null);
 }
 public virtual Value evaluate(Context cx, EmptyStatementNode node)
 {
     //output("<EmptyStatementNode position=\"" + node.pos() + "\"/>");
     return(null);
 }
 public SymConst Visit(EmptyStatementNode node)
 {
     throw EvalException();
 }