Visitor pattern allows you to add new operations or methods to a set of classes without modifying the structure of those classes.
This pattern is especially useful when you want to centralise a particular operation on an object without extending the object Or without modifying the object.
UML diag...
// A simple class hierarchy that uses the visitor to add functionality.
//
class VehicleVisitor;
class Vehicle
{
public:
// To implement the visitor pattern
// The class simply needs to implement the accept method
// That takes a reference to a visitor object tha...
The visitor Pattern can be used to traverse structures.
class GraphVisitor;
class Graph
{
public:
class Node
{
using Link = std::set<Node>::iterator;
std::set<Link> linkTo;
public:
void accept(GraphVisito...
