2 Commits (e3c2ea210eefee9117e4567a4070699da78deaf6)

Author	SHA1	Message	Date
FengJungle	5b21352028	fix vitual base classes issues: add virtual destruct functions.	2021-04-04 21:09:08 +08:00
FengJungle	8f767aa8b8	add Visitor Pattern	2019-11-10 22:59:08 +08:00