Using typeid: class pointer, base class, derived class, : typeid « Development « C++ Tutorial

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C++ Tutorial » Development » typeid

5.24.7.Using typeid: class pointer, base class, derived class,

#include <iostream>

#include <ostream>

#include <typeinfo>



class base {

public:

  virtual ~base() {}

};



class derived : public base {};





int main()

{

  base* b = new derived;

  std::cout << typeid(*b).name() << '\n';      

  std::cout << typeid(base).name() << '\n';    

  derived* d = new derived;

  std::cout << typeid(*d).name() << '\n';      

  std::cout << typeid(derived).name() << '\n'; 

}

7derived
4base
7derived
7derived

5.24.typeid
	5.24.1.	Use typeid
	5.24.2.	Use typeid on a polymorphic class heirarchy
	5.24.3.	Compare the typeid for templates
	5.24.4.	Use a reference with typeid
	5.24.5.	Demonstrating run-time type id
	5.24.6.	Using typeid with templates
	5.24.7.	Using typeid: class pointer, base class, derived class,
	5.24.8.	typeid() function and RTTI must be enabled in compiler
	5.24.9.	Output the name of a typeid
	5.24.10.	print type name of what ptr points at
	5.24.11.	Using typeid: enum data type

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