Behavioral Design Patterns in C++ - Shapes Example - VI

The video tutorial explains the visitor design pattern, which allows adding new operations to existing class hierarchies without modifying them, thus adhering to the open-closed principle. However, it highlights issues such as cyclic dependencies and the inability to perform partial visitation. The tutorial then introduces the acyclic visitor pattern as a solution, which breaks circular dependencies and allows partial visitation by using a marker interface and multiple inheritance.

How does the acyclic visitor pattern address the issues found in the classical visitor pattern?

What requirements must be met to implement the acyclic visitor pattern?