Question

Is there a way to implement visitor design pattern without cyclic dependency? What I mean is that the visitor need an object to visit. and the visited object needs a visitor to accept. In the end both depend on each other.

Answer 1

Found it again! Check out the Acyclic Visitor:

Quote:

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.