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Description 

Runtime Type Identification (RTTI) Overview 

Runtime type identification (RTTI) lets you write portable code that can determine the actual type of a data object at runtime even when the code has access only to a pointer or reference to that object. This makes it possible, for example, to convert a pointer to a virtual base class into a pointer to the derived type of the actual object. Use the dynamic_cast operator to make runtime casts.
The RTTI mechanism also lets you check whether an object is of some particular type and whether two objects are of the same type. You can do this with typeid... more 

The Typeid Operator 

This section contains Typeid Operator topics.