dynamic_cast and virtual function

[Busin]

"dynamic_cast" is used for type conversion among base and derived classes.
Does it matter if base class has virtual function or not? Thanks!

 

[Ali Cehreli]

"dynamic_cast" is used for type conversion among base and derived classes.
Does it matter if base class has virtual function or not? Thanks!

The base class must have at least one virtual function for dynamic_cast to
work.

Ali

 

[Andrey Tarasevich]

"dynamic_cast" is used for type conversion among base and derived classes.
Does it matter if base class has virtual function or not?

It depends on the direction of conversion. There are no extra
requirements for upcasts. For downcasts and cross-casts the source type
must be polymorphic, i.e. it must have at least one virtual function.