001package gudusoft.gsqlparser;
002
003/**
004 * Base class of all visitors that used to visit parse tree nodes. 
005 */
006public class TVisitorAbs {
007   void execute(TVisitedAbs pvisited){
008
009   }
010
011    void preexecute(TVisitedAbs pvisited){
012
013    }
014    void postexecute(TVisitedAbs pvisited){
015
016    }
017}