有没有办法实现访客设计模式没有循环依赖？我的意思是访客需要一个访问对象.并且访问对象需要访问者接受.最终两者都相互依赖.
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Acyclic Visitor：
引用：
Allow new functions to be added to existing class hierarchies without affecting those hierarchies,and without creating the troublesome dependency cycles that are inherent to the GOF VISITOR Pattern.
