C++ RTTI Viable Examples [closed]

Question

I am familiar with C++ RTTI, and find the concept interesting.

Still there exist a lot of more ways to abuse it than to use it correctly (the RTTI-switch dread comes to mind). As a developer, I found (and used) only two viable uses for it (more exactly, one and a half).

Could you share some of the ways RTTI is a viable solution to a problem, with example code/pseudo-code included?

Note: The aim is to have a repository of viable examples a junior developer can consult, criticize and learn from.

Edit: You'll find below code using C++ RTTI

// A has a virtual destructor (i.e. is polymorphic) // B has a virtual destructor (i.e. is polymorphic) // B does (or does not ... pick your poison) inherits from A  void doSomething(A * a) {    // typeid()::name() returns the "name" of the object (not portable)    std::cout << "a is [" << typeid(*a).name() << "]"<< std::endl ;     // the dynamic_cast of a pointer to another will return NULL is    // the conversion is not possible    if(B * b = dynamic_cast<B *>(a))    {       std::cout << "a is b" << std::endl ;    }    else    {       std::cout << "a is NOT b" << std::endl ;    } } 

Answer 1

Acyclic Visitor (pdf) is a great use of it.

Answer 2

How about the boost::any object!

This basically uses the RTTI info to store any object and the retrieve that object use boost::any_cast<>.