Feel::Visitor< T, R > Class Template Reference

This class is the base class to implement the Visitor Pattern. More...

Collaboration diagram for Feel::Visitor< T, R >:

Typedefs
typedef R	return_type

Constructors, Destructors and methods
virtual	~Visitor ()
	virtual base destructor
virtual return_type	visit (T *)=0
	visit a data structure
return_type	visit (T &__t)
	visit a data structure

Detailed Description

template<class T, typename R = void>
class Feel::Visitor< T, R >

This class is the base class to implement the Visitor Pattern.

Let's A be a visitor class to a class B:

class A: public Visitor<B>
{
public:
...
void visit(B * b)
{
..implement the functionnality to be added to a B class..
}
};
class B:
{
public:
void accept(Visitor<B>* b){  b->visit(this); }
};

Author

Christophe Prud'homme Chris.nosp@m.toph.nosp@m.e.Pru.nosp@m.dhom.nosp@m.me@an.nosp@m.n.ju.nosp@m.ssieu.nosp@m..fr

See also

Gamma, Helm, Johnson, Vlissides, Design Patterns Pub: Addison Wesley